Every time I launch Firefox it pops up an error stating "Firefox could not install this item because "install.rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem."

Firefox could not install this item because "install.rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem.
The statement above is in the pop up error box every time, when I launch Firefox. If I click ok in the box Firefox then opens. How do I fix this initializing/launch problem?

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]]
If it does work in Safe-mode then disable all your extensions and then try to find which is causing it by enabling one at a time until the problem reappears. 
You can use "Disable all add-ons" on the [[Safe mode]] start window to disable all extensions. 
You have to close and restart Firefox after each change via "File > Exit" (Mac: "Firefox > Quit"; Linux: "File > Quit")

Similar Messages

Help I need help. i get this message'Firefox could not install this item because "install.rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem.' How do i fix this?

Firefox could not install this item because "install.rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem.
Well that is the message i get. I can still use firefox(version3.6.8)

You get that error if an extension is using an old and no longer supported method to install a plugin.
Which plugin are you trying to install?
See also http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

Firefox/3.6.10 shows message whenever I click on an icon needing Internet access, saying 'Firefox couldn't install this item because "install rdf" (provided by the item) is not well-formed or does not exist' and advising me to contact the author - ???

Whenever access to the Internet is needed, clicking on any icon or link (including the Firefox icon) results in a delay of around 20 secs., followed by the appearance of the error message, headed "Malformed File". The message reads 'Firefox couldn't install this item because "install rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem.'
Clicking OK or closing the box leads to a further delay of about 20 secs. after which the required action takes place! Of course, it could be said that it's really only a delay, so I should just get used to it, but it's still a malfunction, it's a pain in the neck or another region, and I really would like to cure it. Any suggestions - please????

https://support.mozilla.com/en-US/questions/756907

My elements 12 is showing this message:This Application has requested the Runtime to terminate it in an unusual way. Please contact the applications support team for more info. Does anyone know how to contact them, I can't find my oringinal package wiht

Has anyone had a problem with a Runtime message closing down their application. How do you contact the technical support team.?

See if this helps:
https://helpx.adobe.com/photoshop-elements/kb/microsoft-c-runtime-error-launcing.html

Photoshop Elements 10 in Windows 8 will not open. Adobe Photoshop Elements 10 Error Message: "Microsoft Visual C++ Runtime Library Runtime Error. This application has requested the Runtime to terminate it in an unusual way. Please contact the application'

How to get Elements 10 to open in Windows 8 ?
See the error message quoted above in the subject line.

See this help document:
https://helpx.adobe.com/photoshop-elements/kb/microsoft-c-runtime-error-launcing.html

Trying to start Lightroom 3 this morning and I'm receiving a "Runtime Error! This application has requested the Runtime to terminate it in an unusal way. Please contact the application's support team for more inforamtion." Has anyone experienced this befo

Didn't mention above but I have tried uninstalling and re-installing the program and I still receive the same error message.

Try looking at the entry " Runtime Error! after installation of Photoshop a Elements 10..." Under "More like this" on the right of your question. It might help you.

This application has requested the runtime to terminate it in an unusual way please contact the application's support

I randomly get this error message "This application has requested the Runtime to terminate it in an unusual way. Please contact the application's support."
Here's a picture of it. http://i48.tinypic.com/35hradh.jpg
It doesn't tell me what application or process is responsible. :/
It pops up randomly when I wait long enough. It will pop up even if I don't have anything open and I just leave my computer to idle. When I close it or click okay, windows explorer gui will crash and restart. I can still use the computer after this without
restarting but again if I wait long enough it will occur again. I've look around and tried many solutions but nothing has worked.
I've tried a full virus scan, and malware scan with no luck. Tried the registry cleaner from CCleaner and doesn't fix it. I've ran it in safe mode and the error didn't seem to occur or maybe I didn't wait long enough (30-40 minutes). I've tried a SFC
scan and nothing comes up as wrong. I've done a cleanboot several times with no help. I can't do a system restore since the latest restore point is on the same day that I got the error unfortunately.
When the error occurs the pop up window is from Microsoft Visual C++. I've tried uninstalling and reinstalling Microsoft Visual C++ for my 2010 versions but with no luck. I've uninstalled the recent programs that I installed and no help either.
In the event viewer, it shows that there is an error and the source is an application error. The details are...
Faulting application name: Explorer.EXE, version: 6.1.7600.16768, time stamp: 0x4d6878c3
Faulting module name: msvcrt.dll, version: 7.0.7600.16930, time stamp: 0x4eeaf834
Exception code: 0x40000015
Fault offset: 0x0005620a
Faulting process id: 0x980
Faulting application start time: 0x01cdf12d86b1dd89
Faulting application path: C:\Windows\Explorer.EXE
Faulting module path: C:\Windows\system32\msvcrt.dll
Report Id: d1f9cfa3-5d22-11e2-94b5-001fd0d13411
The event that always follows after this one is always a Windows Error Reporting Log.
Fault bucket 2836122452, type 1
Event Name: APPCRASH
Response: Not available
Cab Id: 0
Problem signature:
P1: Explorer.EXE
P2: 6.1.7600.16768
P3: 4d6878c3
P4: msvcrt.dll
P5: 7.0.7600.16930
P6: 4eeaf834
P7: 40000015
P8: 0005620a
P9:
P10:
Attached files:
C:\Users\Dennis\AppData\Local\Temp\WER2815.tmp.WERInternalMetadata.xml
These files may be available here:
C:\Users\Dennis\AppData\Local\Microsoft\Windows\WER\ReportArchive\AppCrash_Explorer.EXE_4dd84d182b87996cc0ddaff5b22f2f6085c2259_10063f95
Analysis symbol:
Rechecking for solution: 0
Report Id: d1f9cfa3-5d22-11e2-94b5-001fd0d13411
Report Status: 0
I checked the process that the error message window links to and it is explorer.exe but I'm not sure what I can do since it's an essential windows file and I can't just delete it.
Anyone have any ideas what is going on?
Thanks.

Hi ,
Do you remember if you have installed some software prior to this issue?
Delete programs you never use.
If the issue reoccurs in Clean Boot, but works fine in Safe Mode, the cause may be the disabled hardware drivers. You may narrow down the
causes in Device Clean Boot.
Device Clean Boot
=================
1. Click Start, type "devmgmt.msc" (without quotation marks) in the Search bar and press Enter.
2. Expand "Sound, video and game controllers".
3. Right click on your sound card and then click "Properties.
4. In the dropdown menu of Device Usage, please choose "Do not use this device (disable)" and click OK.
5. Please use the same method to disable other dubious hardware such as: internal modem, network card and CD-R drive. Please note some devices
such as video adapter are not available to be disabled.
Tracy Cai
TechNet Community Support

I am unable to burn mp3 audio files to cd.I have tried different speeds but every time it ays failed due to media write error.Can anyone help what to do?

I am unable to burn mp3 audio files to cd.Every time it says failed due to media write error.I have tried different speeds.Can anyone help pls?

There are several different incompatible media sold as writeable CDs. You MUST match the media to the abilities of your drive.
I was flummoxed by buying 8x media when my drive was a 2x drive. I needed the other type, and there was nothing helpful in the diagnostics or the packaging that helped me understand that.
EDIT: There is an interesting helpful feature buried in System Profiler ... (read the last two lines of the report):
About this Mac > ( More Info ) > Report > Disc burning

When i try to use firefox it says that install.rdf is not well formed or doesn't exist. what can i do?

i click the firefox button on my desktop and a window pops up saying what i wrote in my question. i turn the window off and firefox opens normally. it says exactly this:
Firefox could not install this item because "install.rdf" (provided by the item) is not well formed or does not exist. Please inform the authors about this problem.

This error can be caused by an extension that tries to install a plugin in a way that is not compatible with current Firefox versions.
Do you see any disabled extensions in Tools > Add-ons > Extensions ?
See:
*[[Troubleshooting extensions and themes]]
*[[Troubleshooting plugins]]

I've started getting pop-under ads every time I launch Firefox, and the uninstall instructions don't make sense, how can I stop these?

In the past couple of weeks, every time I launch Firefox, a full-size pop-under ad is also launched, regardless of what site I'm browsing.
The original ad was for a You Tube survey, and contains a link to coupondropdown.com, where there's a menu option for uninstalling. The uninstall instructions don't make sense, they don't mention what ad-on is controlling the ads, and I can't work out what's responsible for the ads from my very basic range of ad-ons.
The reason I'm writing is that the ads have progressed from annoying but harmless, to dangerous. The ad today was designed as a warning pop-up, text reads, "Threat Detected: Immediate Action Required. Fatal Registry Error ... click "Repair All" to eliminate all possible threats and clean your PC". I have screenshots of all the above.
I'm worried that another user, my son or mother, might take this warning seriously and install malware by accident. What can I do to prevent these ads? I expect this type of malware advertising on dodgy websites, but I'm getting them when I try to access hotmail, the news, etc, so it's not the website that's causing them.

Found the source using Microsoft Safety Scanner on a full scan. The culprit was a Trojan:Win32/Sirefef!cfg

I have a Shockwave Error: "This Shockwave movie has errors that have caused playback problems. Please contact the author of this content regarding this problem. Shockwave is unable to continue." What I can make ?

I have a Shockwave Error: "This Shockwave movie has errors that have caused playback problems. Please contact the author of this content regarding this problem. Shockwave is unable to continue." What I can make ?

This is some built-in "protection" that was engineered into Shockwave some years ago. It means that SW will ignore the first 10 script errors then throw the dialogue you are seeing. You really will have to contact the developer of the content in question to have it fixed - there's nothing anyone else can do. The developer needs to replicate your error, determine the cause, rectify it and republish their movie

This is what I get when I try to log in to Advanced Interface in Knology WebMail: Remote XUL This page uses an unsupported technology that is no longer available by default in Firefox. Please contact the website owners to inform them of this problem.

When trying to log in to Knology WebMail, I get the response "Remote XUL This page uses an unsupported technology that is no longer available by default in Firefox. Please contact the website owners to inform them of this problem." However, this is NOT a problem with Knology, but apparently, with Firefox.

https://addons.mozilla.org/en-US/firefox/addon/remote-xul-manager/

Some files on the server may be missing or incorrect. Clear browser cache and try again. If the problem persists please contact website author.

I've been building a site in Muse successfully until today when I get this error message in the browser, publishing to business catalyst as a test bed:
Some files on the server may be missing or incorrect. Clear browser cache and try again. If the problem persists please contact website author.
Clearing the cache has no effect and I have checked the assets and there are no error symbols. This happened after trying a google translate code in the <head> and a HTML snippet on the master template, I've since removed it but that the last action I took that I can think may have had an effect.
Viewing the source of the page in Safari hash;t helped other than it shows ALOT of html (including some elements i can;t relate to in my site design) and states there are three errors:
[Warning] Invalid CSS property declaration at: ; (index.html, line 1)
the site is Kingsdown Holiday Homes - Self Catering Chalet Rental at Kingsdown Park, Kent | Home
I started this site in Muse CC and then recently upgraded to Muse CC 2014, and I had install issues so deleted the original program (this then forced the download of the new version which was not automatically downloading even though CC notified me that an update was required.
Any information gratefully received.
Thanks,
Andrew

Same problem here but it has nothing to do with a cellular connection.
Created the site http://www.blackdot.com in Muse 7.4.3 with no issues. Just updated the .muse file today to Muse CC 2014 and reloaded to our web server. Now I am getting the error "Some files on the server may be missing or incorrect." when viewing the site from the latest version of all browsers (Safari, Firefox, Chrome) on a Mac and all browsers on a PC (Safari, Firefox, Chrome, Explorer), also mobile Safari on an iPad.
My connection is wired broadband, not a mobile or wireless connection. I am not using the Muse "Upload to FTP host…" option and will not be using it. I am simply exporting as HTML and copying the files to my server. I have deleted all files from the web server and recopied the updated site with the same error result. This is the exact same procedure I used to load the initial site with the prior version of Muse.
It does not seem like there is an existing solution to this problem although many others are experiencing it. It looks like I will need to manually edit each page to remove the error message coding from the html files. Any tips on how to strip out the alert message from the html?
UPDATE
For anyone else experiencing this issue, I was able to edit the .html files for my site to remove the code responsible for this alert message. If you wish to edit your .html files you must make the same edit to every .html file in your site export including the top level "index.html" and all .html files inside the "tablet" and "phone" folders if you have them.
The coding to remove is at the bottom of each .html file:
(Muse.assets.outOfDate.length||Muse.assets.required.length)&&alert("Some files on the server may be missing or incorrect. Clear browser cache and try again. If the problem persists please contact website author.")
Make sure you do not remove any semicolons or braces {} when making this edit. Just remove the text shown above. You will obviously need to remake these edits if you export your site as HTML in the future.

When I publish my site on one specific page where i've added {tag_pagecontent} I get the error:Some files on the server may be missing or incorrect. Clear browser cache and try again. If the problem persists please contact website author.

When I publish my site on one specific page where I've added {tag_pagecontent} I get the error:
'Some files on the server may be missing or incorrect. Clear browser cache and try again. If the problem persists please contact website author.'
I'm trying to get a blog module going, I've even deleted the html insert bog with the tag in and re-published which then I don't get the error but as a result no blog either. But then I add the tag in again and publish the error comes back. I've used the dev console and it says that my musicians sample.css is out of date but why is it only out of date when I add in html to my muse site?
HELP!!!! I've searched other threads and to no avail I'm publishing so no direct ftp going on. the only thing I changed in business catalyst was the module stylesheet in order to style the blog. I've tried uploading and replacing all files nothing seems to work. the site is here:
http://www.musicstudentsforhire.co.uk/musicians-samples.html
It's only this page as it has the blog on. Also I've noticed when I've re-published occasionally it will show the mobile version on my desktop and not the desktop version??? no idea why that's happening so I've had to turn that off. any explanation on why that is happening would also be much appreciated.

I haven't received an answer as of yet, I'll post t on here when I do. I de-activated the mobile site because it's my clients site so he needs it to be operational during the day. I hope someone gives me an answer soon.

I have instaled Windows 7 64bit Enterprise edition and installed the lastest version of Firefox and it freezes every time i launch it. Please help me.

I have instaled Windows 7 64bit Enterprise edition and installed the lastest version of Firefox and it freezes every time i launch it. Please help me.
4d4aae27-34ee-4620-b349-c03002813b2003-Jan-1312:30 AM
54e24e0e-dfc4-466b-a347-4bd95536773e03-Jan-1312:30 AM
22d351d2-6461-4f33-9fbd-6d31f769e73103-Jan-1312:30 AM
8a8da99b-335e-43bb-aa12-4634aa0b431003-Jan-1312:30 AM
a15bb095-aeb9-44e1-a79c-1a17cee207d503-Jan-1312:28 AM

None if these crash reports seem to have been send.
Do you have crash reports with a "bp-" prefix that were submitted and that show a crashing thread?
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
You can use one of these to start Firefox in Safe mode:
*On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut
*On Mac, hold down the Options key while starting Firefox
See also:
*http://kb.mozillazine.org/Firefox_crashes
*https://support.mozilla.org/kb/Firefox+crashes

Every time I launch Firefox it pops up an error stating "Firefox could not install this item because "install.rdf" (provided by the item) is not well-formed or does not exist. Please contact the author about this problem."

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