Error Console in Firefox

I am getting many warning messages in the error console using Firefox V 13. This one seems to be the most prevalent. It's not causing problems except that on some machines it causes the error console to pop up and is distracting for the users. "Warning: Unknown property '-moz-box-shadow'. Declaration dropped. " My suspicion is there will always be warning messages, is there a way to suppress the Error Console in v 13 ?

If you CAN NOT be polite here in the forum, then PLEASE TAKE YOUR SORRY ARSE somewhere ELSE..
People VOLUNTEER their time here to help others, like your SORRY ARSE.. We don't do it to see Flippant responses like this...
Take this as a warning..
Thank you,
Tony Miller
Dallas, TX

Similar Messages

I am unable to view source or bring up the error console in firefox 4

I just upgraded from Firefox 3.6.15 to Firefox 4 on my Mac running Snow Leopard. I am unable to view the source of websites and I am unable to bring up the error console. When I try to do any of these tasks nothing happens.

Same here, on Firefox 5.0

Error Console opens each time Firefox starts using latest stable version.

I open Firefox, it opens and it's Error Console opens. There are a history of information messages, warnings, and errors showing. Why is this happening?

Some mouse gesture extensions (Tools > Add-ons > Extensions) have been reported to cause that to happen.
See:
* [[Troubleshooting extensions and themes]]

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 cannot install Adobe Reader X or 9.4 into Firefox. It tells me to review the Error Console, 203.

This is the error I get:
Firefox could not install the file at
http://platformdl.adobe.com/NOS/getPlusPlus/1.6/gp.xpi
because: Unexpected installation error
Review the Error Console log for more details.
-203
Any help would be greatly appreciated. I am running Windows 7 Ultimate.

This link should help - https://support.mozilla.com/kb/Unexpected+installation+error+-203+when+installing+add-ons

Error Console box opens automatically when I open Firefox. How do I fix this?

The Error Console box opens automatically every time I open Firefox. What can I do to fix this problem. I've already tried uninstalling and reinstalling Firefox and restarting computer after doing so.

This is likely due to an extension. For example, the Web Developer extension has a setting to open the error console, and some mouse gesture extensions have been known to open the error console.
To track down what extension is causing this for you, follow the procedure in this link - https://support.mozilla.com/kb/Troubleshooting+extensions+and+themes

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

[Solved] Disable firefox error console?

I have mapped two mouse gestures to the same function in firefox using two different extensions. I know this sounds really stupid but it is absolutely necessary! As a result, the error console opens every time I start firefox. The messages tab is displayed but no message shows up. This is very annoying so does anyone know an about:config option or a jar I can unpack and edit to stop it from showing up?
Last edited by ConnorBehan (2009-06-16 19:06:51)

Ok after getting vague help at best from irc.mozilla.org I went grepping. I grepped xulrunner-1.9.0.11/chrome and firefox-3.0/chrome for all occurences of 'console.xul' and when I found one, I went into the corresponding file and commented it out. Problem solved! (In a horrible way)
This means I can't access it even if I wanted to. But that's ok because many console extensions make the built in console obsolete. I suppose the way to do this without wasting space would be to find out how to compile xulrunner and firefox so that they come with no console. But I imagine that would be difficult.

Firefox is clearing permanently my error console ?

If on a website an error occurs it's normally is being logged in the error console.
Since short time however a very strange problem appears in my Firefox. If I visit a website which has JavaScript error and then I go to the error console all these error are listed there. But unfortunately these errors are being deleted from the list within a few seconds. Not at once but one after an other.

This issue can be caused by an extension (maybe Firebug) that isn't working properly.
Start Firefox in [[Safe Mode]] to check if one of the add-ons is causing the problem (switch to the DEFAULT theme: Tools > Add-ons > Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

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.

When i try to add DownloadHelper it comes up with unexpected installation error review the error console log for more details - 203, how to it check the log and how do i fix this problem?

== Issue
==
I have another kind of problem with Firefox
== Description
==
When i tried to install DownloadHelper this happened Firefox could not install the file at
https://addons.mozilla.org/en-US/firefox/downloads/latest/3006/addon-3006-latest.xpi?src=addondetail
because: Unexpected installation error
Review the Error Console log for more details.
-203
, how do i check the log and how do i resolve this problem? thank you
== This happened
==
Just once or twice
== today
==
== Troubleshooting information
==
Application Basics
Name
Firefox
Version
3.6.3
Profile Directory
Open Containing Folder
Installed Plugins
about:plugins
Build Configuration
about:buildconfig
Extensions
Name
Version
Enabled
ID
Ask Toolbar for Firefox
2.1.0.5
true
AVG Safe Search
9.0.0.783
true
{3f963a5b-e555-4543-90e2-c3908898db71}
Java Console
6.0.17
true
Microsoft .NET Framework Assistant
1.1
true
{20a82645-c095-46ed-80e3-08825760534b}
BitDefender Antiphishing Toolbar
2.0
true
[email protected]
Modified Preferences
Name
Value
accessibility.typeaheadfind.flashBar
0
browser.places.smartBookmarksVersion
2
browser.startup.homepage_override.mstone
rv:1.9.2.3
extensions.lastAppVersion
3.6.3
general.useragent.extra.microsoftdotnet
(.NET CLR 3.5.30729)
network.cookie.prefsMigrated
true
places.last_vacuum
1276351876
print.print_printer
HP Photosmart D5300 series
print.printer_HP_Photosmart_D5300_series.print_bgcolor
false
print.printer_HP_Photosmart_D5300_series.print_bgimages
false
print.printer_HP_Photosmart_D5300_series.print_command
print.printer_HP_Photosmart_D5300_series.print_downloadfonts
false
print.printer_HP_Photosmart_D5300_series.print_edge_bottom
0
print.printer_HP_Photosmart_D5300_series.print_edge_left
0
print.printer_HP_Photosmart_D5300_series.print_edge_right
0
print.printer_HP_Photosmart_D5300_series.print_edge_top
0
print.printer_HP_Photosmart_D5300_series.print_evenpages
true
print.printer_HP_Photosmart_D5300_series.print_footercenter
print.printer_HP_Photosmart_D5300_series.print_footerleft
&PT
print.printer_HP_Photosmart_D5300_series.print_footerright
&D
print.printer_HP_Photosmart_D5300_series.print_headercenter
print.printer_HP_Photosmart_D5300_series.print_headerleft
&T
print.printer_HP_Photosmart_D5300_series.print_headerright
&U
print.printer_HP_Photosmart_D5300_series.print_in_color
true
print.printer_HP_Photosmart_D5300_series.print_margin_bottom
0.5
print.printer_HP_Photosmart_D5300_series.print_margin_left
0.5
print.printer_HP_Photosmart_D5300_series.print_margin_right
0.5
print.printer_HP_Photosmart_D5300_series.print_margin_top
0.5
print.printer_HP_Photosmart_D5300_series.print_oddpages
true
print.printer_HP_Photosmart_D5300_series.print_orientation
0
print.printer_HP_Photosmart_D5300_series.print_pagedelay
500
print.printer_HP_Photosmart_D5300_series.print_paper_data
9
print.printer_HP_Photosmart_D5300_series.print_paper_height
11.00
print.printer_HP_Photosmart_D5300_series.print_paper_size_type
0
print.printer_HP_Photosmart_D5300_series.print_paper_size_unit
1
print.printer_HP_Photosmart_D5300_series.print_paper_width
8.50
print.printer_HP_Photosmart_D5300_series.print_reversed
false
print.printer_HP_Photosmart_D5300_series.print_scaling
1.00
print.printer_HP_Photosmart_D5300_series.print_shrink_to_fit
true
print.printer_HP_Photosmart_D5300_series.print_to_file
false
print.printer_HP_Photosmart_D5300_series.print_unwriteable_margin_bottom
0
print.printer_HP_Photosmart_D5300_series.print_unwriteable_margin_left
0
print.printer_HP_Photosmart_D5300_series.print_unwriteable_margin_right
0
print.printer_HP_Photosmart_D5300_series.print_unwriteable_margin_top
0
privacy.sanitize.migrateFx3Prefs
true
security.warn_viewing_mixed
false
== Firefox version
==
3.6.3
== Operating system
==
Windows Vista
== User Agent
==
Mozilla/5.0 (Windows; U; Windows NT 6.0; en-GB; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)
== Plugins installed
==
*-npdivxplayerplugin
*Default Plug-in
*Adobe PDF Plug-In For Firefox and Netscape "9.3.2"
*The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
*NPRuntime Script Plug-in Library for Java(TM) Deploy
*6.0.12.732
*RealPlayer(tm) LiveConnect-Enabled Plug-In
*RealJukebox Netscape Plugin
*Shockwave Flash 10.0 r45
*Adobe Shockwave for Director Netscape plug-in, version 11.5
*iTunes Detector Plug-in
*DivX Web Player version 2.0.0.254
*GEPlugin
*4.0.50524.0
*Office Live Update v1.4
*NPWLPG
*Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
*RealPlayer(tm) HTML5VideoShim Plug-In
*Google Update
*Next Generation Java Plug-in 1.6.0_20 for Mozilla browsers

Mark Leary:
As TXGuy posted above:
See:
https://support.mozilla.com/en-US/kb/Unexpected+installation+error+-203+when+installing+add-ons
http://kb.mozillazine.org/Unable_to_install_themes_or_extensions_-_Firefox#Unexpected_installation_error_-203
Also see:
http://support.mozilla.com/en-US/kb/Profiles#How_to_find_your_profile
http://kb.mozillazine.org/Show_hidden_files_and_folders

DetectFlashVer not defined this is the error I get when I look at the error consol. i am trying to open a link and that's the error I get. It won't open the link. All I get is a blank screen.

I downloaded a program to help me with a game I am playing. I can't open the link. All I see is a blank page. I looked at the error console and it said detectFlashVer not verified. i am sot sure why it would say this. I have updated and redownloaded flash a bunch of times. I just don't know why i can't open this link.

Start Firefox in [[Safe Mode|Safe Mode]] to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).
*Do not click the Reset button on the Safe mode start window or otherwise make changes.
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

I think the error console might be a source of memory and lagging errors

I notice that if I open the Firefox Error Console logs that the error listings are fast and frequent (which is okay if the browser is working past them). However, after using Firefox v2 and upward I am now pondering if the error log might be the source of the hard-to-kill lagging and memory issues. I note that as the longer Firefox runs, the longer the error log must grow as well as the number of page fault calls which all eats up memory or requires more frequent disk swap paging to record it all. The longer it all runs, the bigger the error log goes.
Since the error log probably gets more leeway on memory cleanups and CPU hits (to retain accuracy) this eats up more processor time and more hard-to-kill memory space, which then kicks in the system's Paging File causing more disk swapping.
My suggestion is simple, create an ABOUT:CONFIG option to, clip off the error log once 100 (or user-defined) errors are hit. Delete the oldest errors, keep the newest until they get pushed off the rotating stack. Obvious problems with this are first renumbering rolls (deleting 001 and changing 002 to oo1 and so on also eats up pointless CPU cycles). Having an ever-growing numbering stack would hit an out-of-bounds error eventually (delete 001, number latest error 101, and so on).
A rotating "ERROR ROLLOVER LIST POSITION MARKER" is simpler.
Just have a variable called "ERROR LIST ROLL MARKER" and it holds a variable of 001 to 100. Whatever numerical value of the "ERROR LIST ROLL MARKER" is marks where the text value of the error listing is named "ERROR LIST ROLL MARKER".
Let us use for example that the last error on the rolling error list was at position 087
Text value for error list position 087: [ reference to undefined property ]
The value of numeric variable "ERROR LIST ROLL MARKER" would be 088
The text value for error list position 088: [ ERROR LIST ROLL MARKER ]
When we get the next new error, the variable numeric value of "ERROR LIST ROLL MARKER" would become 089
The text for error list position 089 would become: [ ERROR LIST ROLL MARKER ]
The text value for error list position 088 would become the text of whatever the current error was.
In this manner you can keep a simple quick list, save a bundle of memory, and in the event of a crash, you look for ERROR LIST ROLL MARKER values and you know exactly what the last error was and the 99 that preceded it.
When the ERROR LIST ROLL MARKER hits 100, then you simply push that to the 001 location when the next error hits and after the next error, the ERROR LIST ROLL MARKER becomes 002 and that current error text overwrites the 001 location.

Hi, I managed to solve the errors (kind of) by using this code.
for (var i:int = tower1BulletArray.length - 1; i >= 0; i--)
if (tower1BulletArray.parent)
tower1BulletArray[l].parent.removeChild(tower1BulletArray[l]);
tower1BulletArray.splice(i, 1);
However, the problem still persists that the bullets stay in the screen after I change the scene. Any solution? Thanks!

I cannot copy and paste details from my bank statement into a word document, without the formatting changing.I have a message in my Error console which reads: server does not support RFC 5746, see CVE-2009-3555

Since transferring data from my desktop to my laptop, i am now having problems copying and pasting details from my bank website in to a word document, the formatting is all over the place. This didnt happen before, when i pasted the details in to the word document the formatting was exactly the same as on the webpage. If I use internet explorer, I dont have this problem, so, I can only assume it has something to do with Firefox. I have checked the "Error console" and I am receiving this message: server does not support RFC 5746, see CVE-2009-3555.

Maybe: 
Dafizilla Table2Clipboard: https://addons.mozilla.org/firefox/addon/1852

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.

Error Console in Firefox

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