How to use Tools Error Console

I was recently trying to troubleshoot a problem of access a secure bank site [SSL problem] and trying to use the error console to figure out what was wrong. It makes little sense to a common end user of Java such as myself.
What does one do with the information in the catagories and what are the Code and Evaluate buttons use? What are you supposed to enter into the 'address' box or whatever it is??
Is the error console just for web page designers or what?

Dianna,
The Error Console isn't intended for the average user. It is mainly used by webpage and program developers for troubleshooting their work. I wish Mozilla would just remove it from Firefox and offer it as an extension for the few number of users who really need it; like Mozilla did with the DOM Inspector a couple of years ago.

Similar Messages

Under Tools/Error console, I keep getting a load of error messages. How do I stop this? Also, when I hover my mouse over something, I get a small blank box instead of expected info.

How do I stop all of the error messages under; Tools/ error console?
Why do I get a small blank box instead of the expected information when I hover the mouse over something?

Hi,
Try the following steps:
1. Check windows updates.
2. Try the Microsoft Fix it in this kb to remove previous install completely:
http://support.microsoft.com/kb/2739501/en-us
3. Reboot.
4. Try installing again.
This seems helpful on the issue.
As always, thank you for your suggestion, Don:)
Regards,
Melon Chen
TechNet Community Support

JNI - How to use the error reporting mechanism?

I've developed a C++ DLL which is loaded from a commercial Win32 application (not written by me) as a plug-in for external calculations. On its initialization the C++ DLL launches the Java VM via the JNI invocation interface. When the DLL functions are called by the application, they forward the calls to Java objects inside the Java VM, again via JNI invocation interface.
This works well, but I have encountered a weird error.
From Java I open a JFrame containing a JTextArea as small console for debug output messages. If I turn output to this debug console off (my printToConsole routine checks whether a boolean flag is set), the string concatenation operator may lead to a crash of the Java VM.
For example, if in one of the Java functions called from the
DLL via JNI invocation interface the following is the first statement,
it leads to a crash of the Java VM and the application that loaded the C++ proxy DLL.
String test=""+Math.random(); // String test not used later
Interestingly, if I comment this statement out, the Java code works fine WITHOUT any crash. I've already thought about potential races and synchronization issues in my code, but I don't see where this is the case. And the string concatenation error fails as well, if I insert sleep() statements in front of it and at other places in the code. However, if I turn on log messages printed to my JFrame debug console (containing a JTextArea), the String concatenation works without problems.
So maybe the JNI interface has a bug and affects the Java VM; I don't see where my JNI code is wrong.
One problem is that I do not get any stdout output, as the C++ proxy DLL is loaded by the Windows application, even if I start the Windows application from the DOS command line (under Windows).
Does anyone know how to use the error reporting mechanism?
http://java.sun.com/j2se/1.4.2/docs/guide/vm/error-handling.html
Is it possible that the JVM, when it crashes, writes debug information about the crash into a file instead of stdout/stderr?
My C++ proxy DLL was compiled in debug mode, but the commercial application (which loaded the DLL) is very likely not.
I do not know hot to find the reason why the String concatenation fails inside the Java function called from the C++ DLL via JNI.

Yes, I've initially thought about errors in the C++ code too. But the C++ code is actually very simple and short. It doesn't allocate anything on the C++ side. It allocates a couple of ByteBuffers inside the Java VM however via JNI invocation interface calls of env->NewDirectByteBuffer(). The native memory regions accessed via the ByteBuffers are allocated not by my own C++ code, but by the program that calls my DLL (the program is Metastock).
The interesting thing is that everything works fine if output to my debug console is enabled, which means that in the Java print routine getConsoleLoggingState() returns true and text is appended to the jTextArea.
static synchronized void print(String str)
{ MetaStockMonitor mMon=getInstance();
if ( mMon.getFileLoggingState() && mMon.logFileWriter!=null) {
mMon.logFileWriter.print(str);
mMon.logFileWriter.flush();
if ( mMon.getConsoleLoggingState() ) {
mMon.jTextArea1.append(str);
Only if output to the JTextArea is turned off (ie. getConsoleLoggingState()==false), the crash happens when the FIRST statement in the Java routine called via JNI invocation interface is a (useless) String concatenation operation, as described above.
String test=""+Math.random(); // String test not used later
Moreover, the crash happens BEFORE the allocated ByteBuffer objects are accessed in the Java code. But again, if console output is turned on, it works stable. If console output is turned off, it works when the (useless) String concatenation operation is removed in the Java routine called from C++.
I've already thought about potential races (regarding multiple threads), but this can be ruled out in my case. It almost appears as if the JVM can have problems when called by the invocation interface (I tested it with Java 1.4.2 b28).
All the calls between C++ and Java go ALWAYS in the direction from C++ code to Java. Unfortunately, there is no special JRE version with extensive logging capabilities to facilitate debugging. And the problem is not easily reproducible either.
JNIEnv* JNI_GetEnv()
JNIEnv *env;
cached_jvm->AttachCurrentThread((void**)&env,NULL);
fprintf(logfile,"env=%i\n",env);
fflush(logfile);
return env;
// function called by Metastock's MSX plug-in interface
BOOL __stdcall createIndEngine (const MSXDataRec *a_psDataRec,
const MSXDataInfoRecArgsArray *a_psDataInfoArgs,
const MSXNumericArgsArray *a_psNumericArgs,
const MSXStringArgsArray *a_psStringArgs,
const MSXCustomArgsArray *a_psCustomArgs,
MSXResultRec *a_psResultRec)
a_psResultRec->psResultArray->iFirstValid=0;
a_psResultRec->psResultArray->iLastValid=-1;
jthrowable ex;
jmethodID mid;
JNIEnv* env=JNI_GetEnv();
jobject chart=getChart(env, a_psDataRec);
if ( chart==NULL) {
return MSX_ERROR;
jobject getChart (JNIEnv* env, const MSXDataRec *a_psDataRec)
jthrowable ex;
jmethodID mid;
int closeFirstValid, closeLastValid;
closeFirstValid=a_psDataRec->sClose.iFirstValid;
closeLastValid=a_psDataRec->sClose.iLastValid;
long firstDate, firstTime;
if (closeFirstValid>=1 && closeFirstValid<=closeLastValid) {
firstDate = a_psDataRec->psDate[closeFirstValid].lDate;
firstTime = a_psDataRec->psDate[closeFirstValid].lTime;
} else {
firstDate=0;
firstTime=0;
jclass chartFactoryClass = env->FindClass("wschwendt/metastock/msx/ChartFactory");
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot find class ChartFactory\n");
printSBufViaJava(sbuf);
return NULL;
mid = env->GetStaticMethodID(chartFactoryClass, "getInstance", "()Lwschwendt/metastock/msx/ChartFactory;");
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot find method ID for ChartFactory.getInstance()\n");
printSBufViaJava(sbuf);
return NULL;
jobject chartFactory=env->CallStaticObjectMethod(chartFactoryClass, mid);
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Exception while calling ChartFactory.getInstance()");
printSBufViaJava(sbuf);
return NULL;
mid = env->GetMethodID(chartFactoryClass, "getChartID", "(Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;Ljava/nio/ByteBuffer;IIIIIII)F");
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot find method ID for ChartFactory.getChartID()\n");
printSBufViaJava(sbuf);
return NULL;
jobject symbolBuf=env->NewDirectByteBuffer(a_psDataRec->pszSymbol, strlen(a_psDataRec->pszSymbol) );
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot allocate symbolBuf\n");
printSBufViaJava(sbuf);
return NULL;
jobject securityNameBuf=env->NewDirectByteBuffer(a_psDataRec->pszSecurityName, strlen(a_psDataRec->pszSecurityName) );
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot allocate securityNameBuf\n");
printSBufViaJava(sbuf);
return NULL;
jobject securityPathBuf=env->NewDirectByteBuffer(a_psDataRec->pszSecurityPath, strlen(a_psDataRec->pszSecurityPath) );
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot allocate securityPathBuf\n");
printSBufViaJava(sbuf);
return NULL;
jobject securityOnlineSourceBuf=env->NewDirectByteBuffer(a_psDataRec->pszOnlineSource, strlen(a_psDataRec->pszOnlineSource) );
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Cannot allocate onlineSourceBuf\n");
printSBufViaJava(sbuf);
return NULL;
// Java Function call leads to crash, if console output is turned off and
// the first statement in the Java routine is a (useless) string concatenation.
// Otherwise it works stable.
jfloat chartID=env->CallFloatMethod(chartFactory, mid, securityNameBuf, symbolBuf,
securityPathBuf, securityOnlineSourceBuf, (jint)(a_psDataRec->iPeriod),
(jint)(a_psDataRec->iInterval), (jint)(a_psDataRec->iStartTime),
(jint)(a_psDataRec->iEndTime), (jint)(a_psDataRec->iSymbolType),
(jint)firstDate, (jint)firstTime );
if (ex= env->ExceptionOccurred() ) {
env->ExceptionDescribe();
env->ExceptionClear();
sprintf(sbuf, "DLL: Exception while calling ChartFactory.getChartID()");
printSBufViaJava(sbuf);
return NULL;

I opened tools-error console and have hundred of warnings & exception - shall I delete them

I have been running Malware virus and Spybot and they usually show I have six Trojans. These problems seem to have started when I ordered a book from Amazon. or maybe something from HSN

You can ignore (CSS) errors in the Tools > Error Console. 
Those errors are only useful if you develop websites and want to check the HTML/CSS and JavaScript code for errors. 
Most errors are code for other browsers like IE or browsers on other platforms or just typos or the result of bad coding.

How to disable the Error Console of FrameMaker11?

Hi,
We use Adobe FDK to convert Frame files to XML and pass it as an input to another client. With FDK10 in Visual Studio 2008, the Raw XML was created with no errors. But, in FDK11 with Visual Stduio 2010, the Raw XML gets created fine but every created node is validated against some schema and throws XML parser error in the Error console. This validation brings down the performance of the customized client we use. Suggest me if there is any option to fix the issue or a way to disable the system default XML validation.Also, attached the error console for more details.
Thanks,
Venkat

The console that Venketraja is talking about is a "pod" in the Structured mode only and is unfortunately mis-named to be the same as the FrameMaker Console. This "console", AFAIK, can not be turned off in the current implementation of FM11. It has been discussed elsewhere, so Adobe engineering is aware of this issue.
@Venketraja, please file a bug report on this indicating that the inability to turn this off is drastically impacting performance. File it here:
https://www.adobe.com/cfusion/mmform/index.cfm?name=wishform&product=63
You could also ask in the Yahoo Frame Developer's Forum, in case anyone ese has come up with a workaround. See: http://groups.yahoo.com/group/frame_dev

Error Console blocking page from loading and will no disable. Trying to post a comment on BBS and page keeps getting blocked. How do I stop error console from blocking pop up or page from loading?

trying to post a message to syncmyride for Ford. A community comments section. The pop up blocker keeps blocking the page even after repeated attempts to click on the allow button. I can't find a way to disable this. When clicking on error console, it list a repeated error report for the page. This is not the exact URL because you have to log into the site in order to get to the point where you can post a comment.

"Clear the Cache": Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now" 
"Remove the Cookies" from sites that cause problems: Tools > Options > Privacy > Cookies: "Show Cookies" 
 
Start Firefox in [[Safe Mode]] to check if one of your add-ons is causing your problem (switch to the DEFAULT theme: Tools > Add-ons > Themes). 
See [[Troubleshooting extensions and themes]] and [[Troubleshooting plugins]]

How to use BundleTransformer in Console Application?

Hi, I have a scss file (style.scss) and I want to transformer it to CSS using BundleTransformer.
How to do it in a Console Application? I'm looking for example code or something like that :)

Hi Shlomi,
In my opinion, this thread is related to ASP.NET forum. So please post thread on that forum for more effective response. Thank you for understanding. Please refer to the following link.
http://forums.asp.net/.
Regards,
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
Click
HERE to participate the survey.

How to use tools to monitor databae if the production server is not direct

accessed? We access our prod server through jump server.
On my workstation, I have plsql developer intalled, and wonder how I can use my tool to connect to the prod server?
Is it posible?

846422 wrote:
No, I support internal client. I used to support external client in other company, as long as I log into vpn, and oracle client tnsnames included those sid, I should be able to log in.
The jump server is not citrix, it is another unix server with ssh ability. I guess it is firewall issue.
How to get around with it? change firewall rule
>
It seems I have to do all command line scripts from now on.yes & enjoy!

How can I add error/console log to a submitted form?

I created a form that I distribute manually over a dedicated server. The form is to be filled using Reader and it is then validated and submitted by email using a custom script. I retreive some data collected during validation and have it pasted to the body of the email as a way to identify what went wrong during the filling of the form. Now I'm wondering, is it possible to generate a log file and/or retreive any data from either the console or anything else which could help me identify JS bugs encountered by the user or eliminate some leftovers from previous scripts and paste it as well in the body of the email? Or, is there already a console log inside the file somewhere and I just need to reach it?

You can't extract data from the console, and the text that is output to the console is not saved into any local file, as far as I'm aware.

How to use BAPI_ASSET_RETIREMENT_POST(error)

i am a abaper.
when i use BAPI_ASSET_RETIREMENT_POST to retire An asset,there is an error
message: 'Internal error: Line items were not created for the document'.
the error message is the promble of the system configure?
please help me ! thanks .
the report:
DATA : GENERAL LIKE BAPIFAPO_GEN_INFO,
 RETIREMENT LIKE BAPIFAPO_RET,
 DOCUMENTREFERENCE LIKE BAPIFAPO_DOC_REF,
 RETURN LIKE BAPIRET2.
GENERAL-DOC_DATE = '19991201'.
GENERAL-PSTNG_DATE = '19991201'.
GENERAL-COMP_CODE = '011'.
GENERAL-ASSETMAINO = '000000391866'.
GENERAL-ASSETSUBNO = '0000'.
RETIREMENT-REV_ON_RET = '300'.
RETIREMENT-VALUEDATE = '19991201'.
CALL FUNCTION 'BAPI_ASSET_RETIREMENT_POST'
EXPORTING
ORIGINDOCREFERENCE =
 GENERALPOSTINGDATA = GENERAL
 RETIREMENTDATA = RETIREMENT
ACCOUNTASSIGNMENTS =
FURTHERPOSTINGDATA =
IMPORTING
 DOCUMENTREFERENCE = DOCUMENTREFERENCE
 RETURN = RETURN
IF RETURN-TYPE <> 'E' or RETURN-TYPE <> 'A' .
CALL FUNCTION 'BAPI_TRANSACTION_COMMIT'
 EXPORTING
 WAIT = 'X' .
WRITE :/ RETURN-MESSAGE.
ELSE.
WRITE :/ RETURN-MESSAGE.
ENDIF.

Hi Lee,
Welcome to SDN
Have you checked with your FI consultant regarding the data. Is the data correct?
Have you tried this directly?
Regards,
Atish

Tools.jar: how to use it?

in my app, I use some classes of tools.jar
but I can not find the jar file in JRE directory, which is only in JDK directory.
if I distribute my app to customers, they can not use it, because they possiblly only installed JRE rather than JDK.
so how to use tools.jar?

Isn't tools.jar the JDK tools, e.g., javac, javap, etc.?
What are you doing that requires those tools, such that your customer needs it?
Secondly are you sure that Sun's license allows you to distribute the stuff in tools.jar?
It seems like the only solutions would be to refactor your code to no longer use tools.jar, or tell your customers that they have to install the JDK themselves (I've seen other products do that), or to possibly get a special license from Sun.

How can I get help with message "server does not support RFC 5746, see CVE-2009-3555" from error console. Have recently update Firefox and my Virgin Mobile internet connection doesn't work.

CVE-2009-3555

The message about CVE-2009-3555 is meant for webmasters to make them aware that they need to fix their servers and visitors like you can ignore that warning.
Firefox 3.6 versions can detect such a misconfiguration and displays a warning in the "Tools > Error Console".
* http://wiki.mozilla.org/Security:Renegotiation
* http://kb.mozillazine.org/Error_loading_websites

I have this error in script error console

hey, i get this errors in script error console when i use scripts...
-webkit-min-device-pixel-ratio
The 'charCode' property of a keydown event should not be used. The value is meaningless.
Error: moz is not defined
Source File: javascript:%20-moz-transition
Line: 1
how can i fix this without adding any other things going on my pc?
P.S. I tried to disamble the javascript thingy and didn't show up anything...is that the problem?
If i disamble the javascript from options, then how can i use it for other sites?
== This happened ==
A few times a week
== i don't know

You can ignore (CSS) errors in the Tools > Error Console.
Those errors are only useful if you develop websites and want to check the HTML/CSS and JavaScript code for errors.
Most errors are code for other browsers like IE or browsers on other platforms or just typos or the result of bad coding.
-webkit is used by Safari and Google chrome.
Mozilla uses the -moz prefix for its own CSS properties (-moz-transition requires Gecko 1.9.3 -> Firefox 3.7/4.0 is not yet released).
See https://developer.mozilla.org/en/CSS_Reference/Mozilla_Extensions
Do you have specific problems?
See also http://kb.mozillazine.org/Websites_look_wrong

Firefox error console warnings /ie:/expected declaration but found skipped to next declartion/over 100

source of:https://support. mozilla.com/en-UWarning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://support.mozilla.com/media/css/questions-min.css?build=2244b7a
Line: 1Warning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://support.mozilla.com/media/css/questions-min.css?build=2244b7a
Line: 1Warning: Unknown property 'border-top-right-radius'. Declaration dropped.
Source File: http://support.mozilla.com/media/css/questions-min.css?build=2244b7a
Line: 1

You can ignore (CSS) errors in the Tools > Error Console. 
Those errors are only useful if you develop websites and want to check the HTML/CSS and JavaScript code for errors. 
Most errors are code for other browsers like IE or browsers on other platforms or just typos or the result of bad coding.

Have many warnings in firefox 9.01 error console

new computer - installed firefox 9.01. in yahoo! mail, cannot IM (can IM in IE). opened error console - lots of warnings. cleared. closed & opened FF. opened error console - the more i use FF, the more warnings in FF error console:
<pre><nowiki>Warning: Expected media feature name but found '-khtml-touch-enabled'.
Source File: http://support.mozilla.com/en-US/questions/new?category=d6&product=desktop
Line: 1
Warning: Expected media feature name but found 'modernizr'.
Source File: http://support.mozilla.com/en-US/questions/new?category=d6&product=desktop
Line: 1
Warning: Unknown property '-moz-opacity'. Declaration dropped.
Source File: http://support.mozilla.com/en-US/questions/new?category=d6&product=desktop
Line: 0
Warning: Error in parsing value for 'background-image'. Declaration dropped.
Source File: http://support.mozilla.com/en-US/questions/new?category=d6&product=desktop
Line: 0
support.mozilla.com : server does not support RFC 5746, see CVE-2009-3555
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
Warning: Error in parsing value for 'background'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
support.mozilla.com : server does not support RFC 5746, see CVE-2009-3555
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/jqueryui/jqueryui-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/jqueryui/jqueryui-min.css?build=056af57
Line: 1
Warning: Error in parsing value for 'background'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Expected declaration but found '*'. Skipped to next declaration.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: downloadable font: format not supported (font-family: "MetaBlack" style:normal weight:bold stretch:normal src index:0)
source: https://support.mozilla.com/media/fonts/MetaWebPro-Black.eot?
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 0
Source Code:
@font-face { font-family: "MetaBlack"; font-weight: bold; src: url("../fonts/MetaWebPro-Black.eot?") format("eot"), url("../fonts/MetaWebPro-Black.woff") format("woff"); }
Warning: Error in parsing value for 'display'. Declaration dropped.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 0
Warning: Unknown property 'box-flex'. Declaration dropped.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 0
Warning: Expected media feature name but found 'touch-enabled'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Expected media feature name but found '-webkit-touch-enabled'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Expected media feature name but found '-o-touch-enabled'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Expected media feature name but found '-ms-touch-enabled'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Expected media feature name but found '-khtml-touch-enabled'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Expected media feature name but found 'modernizr'.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 1
Warning: Unknown property '-moz-opacity'. Declaration dropped.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 0
Warning: Error in parsing value for 'background-image'. Declaration dropped.
Source File: https://support.mozilla.com/en-US/questions/new?product=desktop&category=d6&search=have+many+warnings+in+firefox+9.01++error+console
Line: 0
statse.webtrendslive.com : server does not support RFC 5746, see CVE-2009-3555
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
Warning: Error in parsing value for 'background'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Expected declaration but found '*'. Skipped to next declaration.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/questions-min.css?build=056af57
Line: 1
Warning: Error in parsing value for 'filter'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/jqueryui/jqueryui-min.css?build=056af57
Line: 1
Warning: Unknown property 'zoom'. Declaration dropped.
Source File: https://support.mozilla.com/media/css/jqueryui/jqueryui-min.css?build=056af57
Line: 1
Warning: downloadable font: format not supported (font-family: "MetaBlack" style:normal weight:bold stretch:normal src index:0)
source: https://support.mozilla.com/media/fonts/MetaWebPro-Black.eot?
Source File: https://support.mozilla.com/media/css/common-min.css?build=056af57
Line: 0
Source Code:
@font-face { font-family: "MetaBlack"; font-weight: bold; src: url("../fonts/MetaWebPro-Black.eot?") format("eot"), url("../fonts/MetaWebPro-Black.woff") format("woff"); }
support.mozilla.com : server does not support RFC 5746, see CVE-2009-3555</nowiki></pre>
and many more

You can ignore (CSS) errors in the Tools > Error Console. 
Those errors are only useful if you develop websites and want to check the HTML/CSS and JavaScript code for errors. 
Most errors are code for other browsers like IE or browsers on other platforms or just typos or the result of bad coding. 
Reload web page(s) and bypass the cache.
*Press and hold Shift and left-click the Reload button.
*Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
*Press "Cmd + Shift + R" (MAC)
Clear the cache and the cookies from sites that cause problems.
"Clear the Cache":
*Tools > Options > Advanced > Network > Offline Storage (Cache): "Clear Now"
"Remove Cookies" from sites causing problems:
*Tools > Options > Privacy > Cookies: "Show Cookies"
Start Firefox in [[Safe Mode]] to check if one of the extensions or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox (Tools) > Add-ons > Appearance/Themes).
*Don't make any changes on the Safe mode start window.
*https://support.mozilla.com/kb/Safe+Mode

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