Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/chrome/en-US/locale/browser-region/region.propertiesdelta.

I believe I set it up to search from the address bar - so I just typed in a search term 'delta'

Type "about:config" in the address bar.
Scroll down to "keyword.URL"
Right-click and choose "Reset"

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Since downloading firefoz 4, everytime I make a browser search I get a second page with :"Firefox can't find the file at jar:file://how can I solve the problem. Kindly reply to :ramses1@videotron.ca

Question
firefox 4, when I make a browser search I get a second page:"Firefox can't find the file at jar:file:///D:/Program Files/Mozilla Firefox/omni.jar!/chrome/browser/content/browser/<url></url>", how can I solve the problem.

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 > Appearance/Themes).
* Don't make any changes on the Safe mode start window.
See:
* [[Troubleshooting extensions and themes]]

I upgraded to Firefox 8. Now my home page says this: "Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/browserconfig.properties.

This is what it says on my screen when I open Firefox:
Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/browserconfig.properties.

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.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

When searching, I get this message: Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/chrome/en-US/locale/browser-region/region.propertiesproblems.

when I enter a word in the search window (the one with the curved arrow at the end), I get this message:
Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/chrome/en-US/locale/browser-region/region.propertiesproblems.

Try the Firefox SafeMode to see how it works there. 
''A troubleshooting mode, which disables most Add-ons.'' 
''(If you're not using it, switch to the Default Theme.)''
* You can open the Firefox 4/5/6/7 SafeMode by holding the '''Shft''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item, click on '''Restart with Add-ons Disabled...''' while Firefox is running. 
''Don't select anything right now, just use "Continue in SafeMode."''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one. 
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

Why? Firefox can't find the file at ....

== Issue
==
Firefox is crashing or closing unexpectedly
== Description
==
Why do I get this message all day long? I never did before. Firefox can't find the file at jar:file:///C:/Program Files/Mozilla Firefox/chrome/en-US.jar!/locale/browser-region/region.propertiessz0069.ev.mail.comcast.net.
== Firefox version
==
3.6.3
== Operating system
==
Windows XP
== User Agent
==
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 (.NET CLR 3.5.30729)
== Plugins installed
==
*-np-mswmp
*Adobe Shockwave for Director Netscape plug-in, version 10.3
*The QuickTime Plugin allows you to view a wide variety of multimedia content in Web pages. For more information, visit the QuickTime Web site.
*6.0.12.732
*RealPlayer(tm) LiveConnect-Enabled Plug-In
*RealJukebox Netscape Plugin
*Adobe PDF Plug-In For Firefox and Netscape 8.2.2
*Default Plug-in
*Shockwave Flash 10.0 r45
*iTunes Detector Plug-in
*Windows Presentation Foundation (WPF) plug-in for Mozilla browsers
*RealPlayer(tm) HTML5VideoShim Plug-In
*Rhapsody Player Engine Plugin
*Java Plug-in 1.5.0_02 for Netscape Navigator (DLL Helper)

The jar: issue can be caused by the Ask.com toolbar or the "ZoneAlarm Spy Blocker Toolbar" or the [http://foxit.ourtoolbar.com/ Fox-it toolbar] (Tools > Add-ons > Extensions).
See http://forums.mozillazine.org/viewtopic.php?f=38&t=934345

Firefox can't find the file at (a location is specified) when either "Navigate previous" (and next) buttons are pressed in an HTML5 skin (but OK in IE/Chrome).

I create HTML5 help projects from a package called MadCap Flare. It uses what they call an HTML5 'skin' that sets the style/layout of the page and also includes 'Navigate previous' and 'Navigate next' buttons. When viewing the help and pressing these navigate buttons in IE8 or Chrome 32 there is no problem, but in Firefox 27 I get the following: (typical error for pressing a button on any page)
"File not found"
"Firefox can't find the file at /C:/SVN/FlareEnglishOnLineHelp/Output/HTML5_Help_Modeller_Reference/4attrib/idh_jointinterface_element_meshes.htm?TocPath=Modeller Reference Manual|Chapter 5 : Model Attributes|Meshing|_____2."
" Check the file name for capitalisation or other typing errors."
" Check to see if the file was moved, renamed or deleted."
- Because the files and buttons work in other browsers I'm wondering just what is going on here with Firefox>>>>

I should correct that last entry and state that the | charactacters are generated automatically in the Toc-Path for each 'book' name in the online help, and are not something manually created, whereas the : characters have come from the TOC book topic names (which were manually entered names and are what we would ideally require). But, because 'previous' and 'next' topics within nested TOC books without colon (:) characters CAN be browsed successfully when just | characters are present in the Toc-Path, the limitation would appear to be solely due to the : characters.

My home page is google and it works but when I open a new tab it displays an error message :Firefox can't find the file at chrome://quick_start/content/index.ht

I've made sure a dozen times that my home page is set correctly, and when I hit the home button next to the search bar it works and takes me right to google BUT whenever i open a new tab i get the error that my page cannot load and the web url that it keeps trying to remember is in the error message:
Firefox can't find the file at chrome://quick_start/content/index.html.
of course the last dot is not the url anymore but the end of the sentence for the error message, but i don't ever use chrome ever on my laptop only my cell so what is going on????? help fix god please!!!!!!

Do you have the FastStart extension?
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
*https://support.mozilla.org/kb/Safe+Mode
*https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

Strange message: "Firefox can't find the file at /b" Please advise.

When I open Firefox I get this message: “Firefox can't find the file at /b". As a browser Firefox is working for me but I have to click the google search button to connect to the internet. I have tried everything I can think of including uninstalling, reinstalling and updating firefox but to no avail. Please advise. Thank you!!

Try the Firefox SafeMode to see how it works there. 
''A troubleshooting mode, which disables most Add-ons.'' 
''(If you're not using it, switch to the Default Theme.)''
* You can open the Firefox 4/5/6/7 SafeMode by holding the '''Shft''' key when you use the Firefox desktop or Start menu shortcut.
* Or use the Help menu item, click on '''Restart with Add-ons Disabled...''' while Firefox is running. 
''Don't select anything right now, just use "Continue in SafeMode."''
''To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before using the Firefox shortcut (without the Shft key) to open it again.''
If it is good in the Firefox SafeMode, your problem is probably caused by an extension, and you need to figure out which one. 
http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+themes

Firefox will not show links to flv files. I get the error message for each flv file: "File not found. Firefox can't find the file at (path) .flv." Any mov and swf files in this same path will show. I can see the videos in Safari so the paths are correct.

Firefox will not show links to flv files. I get the error message for each flv file: "File not found. Firefox can't find the file at http:// (path) .flv." Any mov and swf files in this same path will show. I can see the videos in Safari so the paths are correct.

Is this a webpage that contains a link to a flv file? Please post a link to the page and tell us which link(s) are the problem flv files or else post a link to the .flv file itself.
Alternately, click on one of the sample FLV File links on this page and tell us exactly what happens:
http://www.mediacollege.com/adobe/flash/video/tutorial/example-flv.html
It might also help if you post the exact error message, including the path to the flv file.
'''Note:'''
Depending on how you have Firefox set up, clicking on a FLV File link will either save the FLV file to your computer or Firefox may open it automatically in an external application right after downloading (Firefox may ask you first). Firefox itself can't play FLV files so you need a "helper" application (or a plugin for flv files, if ther is one. You can see if Firefox is already set up to download or open FLV files by going to Firefox Preferences and looking in the Applications list. Find the FLV file type in the list and, if the action is "Open with", it should show the application that can play FLV files (e.g., VLC Media Player or Perian). See [[Managing filetypes]] for more information.

I keep getting this window that pops up while surfing Drudge, File not found, Firefox can't find the file at /C:/Program Files/Mozilla Firefox/D èÎß&ÌªH¿MH¿%1BnàŽ–âPÕ"6´6-%06%1B%0FÜ- ¢Oóü&Ùß%03[Ò–‚Ø%%1C#%17E±MgÓ˜Û%04goS£‡Å-ovûU%08êïÇÔý„€ÙØ–!gäø½.

I keep getting this annoying window that pops up while surfing Drudge:
File not found
Firefox can't find the file at /C:/Program Files/Mozilla Firefox/D>èÎß&ÌªH¿MH¿%1BnàŽ–âPÕ”6´6—%06%1B%0FÜ… ¢Oóü&Ùß%03[Ò–‚Ø%%1C#%17E±MgÓ˜Û%04goS£‡Å…ovûU%08êïÇÔý„€®ÙØ–!gäø½.
Check the file name for capitalization or other typing errors.
Check to see if the file was moved, renamed or deleted.
Do you have any idea how to get rid of this annoying pop-up? I searched for that file name on Google, but nothing came up.
This only started happening after the Scareware program, Open Cloud Security, infected my computer a few days ago. My wife got into my registry to remove Open Cloud, but now I am left with this annoying Firefox problem. I have to close the annoying window TWICE to get back to Drudge.
This happens 6 times per hour.
Thanks

Firefox can't find the file at /C:/WINDOWS/system32/oobe/icserror/icsdc.htm

I deleted a stack of files and must have accidentally deleted this one. I restored my computer and all the other files came back except this one. I uninstalled firefox and reinstalled and still I get Firefox can't find the file at /C:/WINDOWS/system32/oobe/icserror/icsdc.htm
This version also won't let me use my AVG plug in? Says it's not compatible

hello tanisha625, it looks like some program has overwritten the default new tab page. you can either install the [https://addons.mozilla.org/firefox/addon/searchreset/ searchreset addon] to get rid of the problem or manually reset the page that opens on each new tab.
enter '''about:config''' into the firefox location bar (confirm the info message in case it shows up), search for the preference named '''browser.newtab.url''' and double-click & change its value to '''about:newtab'''.

Firefox can't find the file error when trying to download

I am currently not having luck when clicking on the download button for each app...This is the error message I get,
Firefox can't find the file at aam://SAPCode=AEFT?productVersion=12.0?passPhrase=Qx6qMfb9/oWx8agnabYz/ksL9vygzb30ZVZ6+4A KgbiDkQIEh1TTurmjLJXYoGHBdt97o64hQwef/EPa7zXT42z8iGzC7ZzUJWaBk1IID76maBwP1cEMXK0VB+DYo98sF gay7207mzeSwQIwGrMPLC+Ep78B13gEXvFdrr7Tg2I=.
I'm running ML 10.8.4 on 2010 Macbook Pro.
Thanks for any and all help.

clear your adobe.com cookies and retry.

Trouble getting page so reinstalled, get this message-Firefox can't find the file at place:sort=8&maxResults=10. How can I reinstall?

I was trying to customize my page but then Firefox became completely unavailable. It only gives this message, along with 'trouble finding page': Firefox can't find the file at place:sort=8&maxResults=10. I tried rebooting and then reinstalling Firefox but the same message recurs. I can only get to the web now by using Internet Explorer which I don't like. But I may have to switch to it anyway.

That is a place query (smart bookmark) for Recently Visited Location and not a normal bookmark.
*https://developer.mozilla.org/Places_query_URIs
Did you create this query yourself?
You can check the home page setting:
*Tools > Options > General > Startup: Home page
Firefox supports multiple home pages separated by '|' (pipe) symbols.
*https://support.mozilla.org/kb/How+to+set+the+home+page
You can check for problems with the places.sqlite database file in the Firefox profile folder.
*http://kb.mozillazine.org/Bookmarks_history_and_toolbar_buttons_not_working_-_Firefox
*https://support.mozilla.org/kb/Bookmarks+not+saved#w_fix-the-bookmarks-file
*Places Maintenance: https://addons.mozilla.org/firefox/addon/places-maintenance/

Firefox can't find the file at /get/flashplayer/current/install_flash_player.exe.

When I click on the link to download flash player for Firefox
I get this message "Firefox can't find the file at
/get/flashplayer/current/install_flash_player.exe." Is there any
other way to get flash player for Firefox?

I tried if from that link
http://www.adobe.com/products/flashplayer/.
How would you do a manual install?

Firefox can't find the file at chrome://tavgp/content/htmlwindow.xul.

Firefox can't find the file at chrome://tavgp/content/htmlwindow.xul.
== This happened ==
Every time Firefox opened
== I deleted some duplicate files

Looks like a problem with an AVG extension. See [[Troubleshooting extensions and themes]]

Firefox can't find the server

Firefox can't find the server
== URL of affected sites ==
http://

See: http://support.mozilla.com/en-US/kb/Server+not+found
Most often, this is the section of that article that works for users: http://support.mozilla.com/en-US/kb/Server+not+found#Firefox_cannot_load_certain_websites
'''''Other Issues''''': ~~red:You have installed plug-ins with known security issues. You should update them immediately.~~
'''Install/Update Adobe Flash Player for Firefox (aka Shockwave Flash)''': your ver. 10.0 r45; current ver. 10.1 r53 ('''important security update 2010-06-10''')
~~red:Check your version here~~: http://www.mozilla.com/en-US/plugincheck/
See: '''[http://support.mozilla.com/en-US/kb/Managing+the+Flash+plugin#Updating_Flash Updating Flash]'''
-'''use Firefox to download''' and '''SAVE to your hard drive''' (save to Desktop for easy access)
-exit Firefox (File > Exit)
-check to see that Firefox is completely closed (''Ctrl+Alt+Del, choose Task Manager, click Processes tab, if "firefox.exe" is on the list, right-click "firefox.exe" and choose End process, close the Task Manager window'')
-double-click on the Adobe Flash installer you just downloaded to install/update Adobe Flash
-when the Flash installation is complete, start Firefox, and test the Flash installation here: http://kb.adobe.com/selfservice/viewContent.do?externalId=tn_15507&sliceId=1
*'''NOTE: On Vista and Windows 7''' you may need to run the plugin installer as Administrator by starting the installer via the right-click context menu if you do not get an UAC prompt to ask for permission to continue (i.e nothing seems to happen). See this: http://vistasupport.mvps.org/run_as_administrator.htm
*'''NOTE for IE:''' Firefox and most other browsers use a Plugin. IE uses an ActiveX version of Flash. To install/update the IE ActiveX Adobe Flash Player, same instructions as above, except use IE to download the ActiveX Flash installer.
*Also see: http://kb.mozillazine.org/Flash ~~red:'''''AND'''''~~ [[How do I edit options to add Adobe to the list of allowed sites]]

Firefox can't find the file at jar:file:///C:/Program Files (x86)/Mozilla Firefox/omni.jar!/chrome/en-US/locale/browser-region/region.propertiesdelta.

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