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Problematic extensions

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|valign=top| <div id="AVG Safe Search"></div>[http://free.grisoft.com/ AVG Safe Search] |valign=top| <div id="AVG Safe Search"></div>[http://free.grisoft.com/ AVG Safe Search]
|All? |All?
-|Problems include [[Firefox crashes|crashes]], blocking use of ENTER from location bar, and high [[Firefox CPU usage| CPU usage]]. Part of the "Link Scanner" component installed with AVG 8 Free Anti-Virus. +|Problems include [[Firefox crashes|crashes]], blocking use of ENTER from location bar, high [[Firefox CPU usage| CPU usage]] and the cache being purged at shut down. Part of the "Link Scanner" component installed with AVG 8 Free Anti-Virus.
|[http://free.grisoft.com/ww.faq.num-1253 Disable] in Firefox via "Tools -> Add-ons -> Extensions" or [http://free.grisoft.com/ww.faq.num-1338 uninstall using these instructions]. |[http://free.grisoft.com/ww.faq.num-1253 Disable] in Firefox via "Tools -> Add-ons -> Extensions" or [http://free.grisoft.com/ww.faq.num-1338 uninstall using these instructions].
-|[http://forums.mozillazine.org/viewtopic.php?p=3354701] [http://support.mozilla.com/tiki-view_forum_thread.php?comments_parentId=47957&forumId=1] [http://groups.google.com/group/mozilla.support.firefox/browse_frm/thread/292d224b7dd0652d/3b47fa657d9d56a4?hl=en#3b47fa657d9d56a4][http://groups.google.com/group/mozilla.support.firefox/browse_frm/thread/5d0e21375095aa07/54b4e43f867bf458?hl=en&lnk=st&q=group%3Amozilla.support.firefox+avg+safe+search#54b4e43f867bf458]+|[http://forums.mozillazine.org/viewtopic.php?p=3354701] [http://support.mozilla.com/tiki-view_forum_thread.php?comments_parentId=47957&forumId=1] [http://groups.google.com/group/mozilla.support.firefox/browse_frm/thread/292d224b7dd0652d/3b47fa657d9d56a4?hl=en#3b47fa657d9d56a4][http://groups.google.com/group/mozilla.support.firefox/browse_frm/thread/5d0e21375095aa07/54b4e43f867bf458?hl=en&lnk=st&q=group%3Amozilla.support.firefox+avg+safe+search#54b4e43f867bf458] [http://forums.mozillazine.org/viewtopic.php?p=3927325#p3927325]
|- |-
|rowspan=2 valign=top| <div id="DownThemAll"></div>[https://addons.mozilla.org/en-US/firefox/addon/201 DownThemAll] |rowspan=2 valign=top| <div id="DownThemAll"></div>[https://addons.mozilla.org/en-US/firefox/addon/201 DownThemAll]

Revision as of 19:49, 22 July 2008

Extensions are not written by Mozilla, and they are not tested with the browser or in combination with each other. This article lists some extensions that are known to cause problems. There are hundreds of extensions, and most problems are not listed here. If you do not find the problem listed below, follow the steps outlined in the Standard diagnostic - Firefox article.

In some cases, you may need to run Firefox in a special mode called "Firefox Safe Mode" to access the Add-ons manager to disable or uninstall an extension. You may also need to reset preference changes made by the extension that may persist after it is disabled or uninstalled. See Uninstalling add-ons and Safe Mode for more information.

Extensions

Extension Extension version affected Problem Workaround References
A9 Toolbar
All Causes Unresponsive Script Warning Uninstall A9 Toolbar [1]
Adblock All Having the OBJ_TABS setting enabled has been known to cause the ActiveX plugin (if installed) to ignore its configuration and run any ActiveX control, instead of the controls to which it is restricted. This could be a big security risk! If you have the ActiveX plugin, keep the Adblock OBJ_TABS setting disabled, or update to Firefox 1.5.0.7 or later versions, which include a fix. [2] [3]
Having the OBJ_TABS setting enabled may interfere with the Java, Flash or Windows Media Player plugins. Content requiring these plugins may not display unless this setting is disabled. If updating to Adblock 0.5.3.042 or later does not resolve the issue, keep the Adblock OBJ_TABS setting disabled. [4][5] [6] [7]
Causes Google Gmail Chat to crash.  ? [8]
Adblock Plus
0.7.5.2 Windows error opening Internet shortcut or local HTML file - Firefox Update to Adblock Plus version 0.7.5.3 or later [9][10]
All Triggers a bug in Firefox 2 that causes some extensions and web sites to break, most prominently Google Notebook extension Upgrade to Firefox 2.0.0.1 or later [11]

[12]

All-In-One Gestures
All versions using Firefox 2? May cause Firefox crashes. Also conflicts reported with spellchecker in Linux Mac OSX versions. [13]

[14]

All-In-One Sidebar
0.6.4 and prior New extensions will not install. Also occurs in version 0.6.4 if updated from an earlier version or if used together with the SessionSaver extension. Uninstall, then (re)install version 0.6.4. Disable opening the Extensions window in the sidebar (Misc. -> Extensions -> Open in Sidebar). [15]

[16]

Amazing Media Browser
0.17 The "Block all embedded objects" preference is set to "Yes" by default, causing embedded media normally handled by plugins to disappear, including Flash content. Also interferes with the IE Tab extension. Change the "Block all embedded objects" preference setting to "No". [17][18]
AVG Safe Search All? Problems include crashes, blocking use of ENTER from location bar, high CPU usage and the cache being purged at shut down. Part of the "Link Scanner" component installed with AVG 8 Free Anti-Virus. Disable in Firefox via "Tools -> Add-ons -> Extensions" or uninstall using these instructions. [19] [20] [21][22] [23]
DownThemAll
1.0 May cause web browsing to slow to a halt to the point that nothing loads.

Important: DownThemAll 1.0 changes certain "network.http" preferences that will need to be reset, even if you disable or uninstall the extension.
Update to version 1.0.1 and reset these preferences via about:config:
  • network.http.max-connections
  • network.http.max-connections-per-server
  • network.http.max-persistent-connections-per-proxy
  • network.http.max-persistent-connections-per-server
[24] [25] [26][27]
All (?) since 1.0 May cause Windows error opening Internet shortcut or local HTML file - Firefox If updating DownThemAll to version 1.0.2 or later does not resolve the issue, disable or uninstall the extension. [28]
external IP
? Causes Firefox crashes and authentication popups asking username/password for "Development Area" at http://www.crazzy.se Disable or uninstall the extension. [29][30] [31]
Fasterfox
1.0.x Hangs or slows down Firefox Disable prefetching, select "Optimized" preset instead of "Turbo". [32]
All Changes made by Fasterfox can interfere with Web site access and persist after it is uninstalled. Reset options to defaults in Fasterfox before uninstalling it; otherwise, reset preferences in Firefox to the defaults (or create a new profile). [33][34]
Filterset.G Updater
Prior to 0.3.0.2 Memory leak when used in conjunction with FlashGot Update to version 0.3.0.2. [35]
Firebug
All? Causes excessive CPU usage; Firefox may hang when pop-up window is accessed, even if only to close the pop-up. Disable Firebug when you don't need to use it [36] [37]
Causes Firefox to crash on logout from Yahoo! Mail. Disable Firebug when you don't need to use it [38][39]
Firefox Google Bookmarks
Prior to 0.2.1? Interferes with spell checking in Firefox version 2. Update to version 0.2.1. If that does not work, uninstall extension. [40]
FireFTP
All? Can cause excessive CPU usage with Firefox 2.0.0.1 Update Firefox to the latest version [41]
FlashBlock
All NoScript blocks JavaScript, which is required by FlashBlock Do not use both FlashBlock and NoScript together (NoScript includes Flash-blocking functionality) [42]
FlashGot
Prior to 0.5.9.995 Memory leak when used in conjunction with Filterset.G Updater Update to version 0.5.9.995. [43]
ForecastFox
version 0.9.x and all satellite images versions? Memory leak Update or uninstall and install Forecastfox l10n. There are unconfirmed reports that there are also memory problems with versions 0.9.3 and 0.9.4. [44][45]
[46]
Prior to version 0.9.5.1 Causes excessive CPU usage with Firefox 2.0 and Firefox 2.0.0.1 Update to Firefox 2.0.0.2 and ForecastFox 0.9.5.1 [47][48]
Google Browser Sync
All? Causes excessive CPU usage in general or with GIF animations Uninstall [49][50]
 ? May cause notably increased disk usage (in gigabytes) by creating large log files. May cause periodic Firefox freezes. Uninstall [51][52]
Google Toolbar (official)
 ? "Send with GMail" option overrides default mail client. If the Google Toolbar is uninstalled, mail links may stop working in Firefox If still installed, UNcheck "Send with GMail" in Google Toolbar Options. If uninstalled, go to about:config in Firefox, find the preference network.protocol-handler.external.mailto and reset to "true" (double-click will toggle). [53] [54]
1.0.* on windows 98, 2.0.20060404 beta and 2.0.20060515 beta Causes Unresponsive Script Warning The Google Toolbar is not compatible with Windows 95, 98, or ME. Fixed for supported OSs in latest version. [55]
2.0.20060404 beta and 2.0.20060515 beta Leaks memory Install the latest version from toolbar.google.com [56]
2.1.20060713 Causes excessive disk activity Disable Google Safe Browsing or install the latest version from toolbar.google.com [57]
3.x (beta?) Windows error opening Internet shortcut or local HTML file - Firefox Disable or uninstall [58] [59]
Google Web Accelerator
 ? Causes Firefox to crash on closing. Uninstall Google Web Accelerator [60]
Greasemonkey
All Greasemonkey scripts do not work on sites blocked by NoScript Set NoScript to allow JavaScript on sites you wish to use Greasemonkey scripts on. [61]
Hebrew Calendar
Prior to 1.0.4.36 Causes "ReferenceError: JEvent is not defined" Update to a newer version [62]
IE Tab
All Memory leak Uninstall IE Tab and install IE View Lite [63]
iMacros
Prior to 0.5.0.4 Causes excessive CPU usage Update to a newer version [64]
ImgLikeOpera
0.6.15 "Refresh images in tab on tab select" option causes excessive CPU usage on tab change and erratic text box behavior (i.e. losing caret after selection in google search text box). Turn off "Refresh images in tab on tab select" option. [65]
Linky
2.6 Gray bar below the status bar with red arrow. Uninstall Linky. [66]
McAfee SiteAdvisor
 ? "onLookupFailed 55 1" alerts. Disable McAfee SiteAdvisor. [67][68]
[69]
22 Firefox may fail to open after installing or updating the SiteAdvisor extension, which also may be installed as part of a McAfee software suite. This SiteAdvisor support article describes the problem as a conflict between SiteAdvisor and automatic proxy configuration scripts in Firefox. Either follow the workaround in the SiteAdvisor support article or end the firefox process that remains in memory, start Firefox in Safe Mode and uninstall via Tools -> Extensions. If SiteAdvisor is a McAfee suite component it can also be removed using the McAfee uninstaller. [70] [71]
23 Causes Firefox to crash with an error in Jar50.dll after installing or updating the SiteAdvisor extension or McAfee component. Uninstall the SiteAdvisor extension or, if SiteAdvisor is installed as part of a McAfee software suite, remove the SiteAdvisor component using the McAfee uninstaller. [72]
Media Player Connectivity
All? Can cause Unresponsive Script Warning Uninstall Media Player Connectivity [73][74]
MegaUpload Toolbar
All? Causes the error message, Trying to load a non-local URI. Also changes the user agent by adding "MEGAUPLOAD 1.0" which causes some websites to tell you to update to a modern browser. Uninstall the toolbar. To restore the user agent, type about:config in the Location Bar and filter for general.useragent. If the general.useragent.extra.firefox preference shows a user set status, right-click it and select Reset. [75] [76] [77]
Menu Editor 1.2.4
(and 1.2.5?)
Middle mouse button no longer opens new links from web pages Update to the latest version; if the issue persists, disable the extension [78] [79] [80]
Mouseless Browsing
All? Can cause excessive CPU usage Uninstall Mouseless Browsing [81]
Nightly Tester Tools
All Allows incompatible extensions and themes to run; these incompatible add-ons can cause problems Update your extensions and themes to those compatible with your version of Firefox [82]
NoScript
All Causes an illegal operation in the Windows Media Player plugin if it is blocking JavaScript on a page with embedded Windows Media Do not block websites that have embedded Windows Media if you want to be able to play the media [83] [84]
FlashBlock requires JavaScript to work to block flash ads Do not use both FlashBlock and NoScript together (NoScript includes Flash-blocking functionality) [85]
Greasemonkey scripts require JavaScript Set NoScript to allow JavaScript on sites you wish to use Greasemonkey scripts on. [86]
All since 1.1.9.5 Flash and other plugin content is blocked by default on untrusted sites, even content from trusted sites (e.g. YouTube.com) if embedded on an untrusted site. Uncheck the option to forbid Flash or other plugins in NoScript's Options\Plugins pane or temporarily allow the content by clicking on its placeholder. [87] [88] [89]
All since 1.1.0 Java is blocked by default on untrusted sites Uncheck "Forbid Java" in NoScript's Options\Plugins pane (Options\Advanced\Untrusted in earlier versions). In version 1.1.3 and later you can temporarily allow Java content by clicking on its placeholder. [90] [91]
Prior to 1.1.3.9 Causes Firefox to hog memory Update to 1.1.3.9 or later [92]
"Numbered Links" All FormSpy (aka FireSpy) malware identifies itself as "Numbered Links". The real Numbered Links extension is harmless. See this forum topic for more information. Uninstall the extension. Scan your system for viruses, particularly "FormSpy" and "Downloader-AXM". [93][94]
onFocusReload
 ? "Alert! Object Event" message. Uninstall onFocusReload. [95]
RealPlayer Browser Record Plugin
1.0 This extension is included as an option when installing RealPlayer and can cause various issues including image display, form submission, and embedded Flash problems. Uninstall or disable this extension. In Firefox, go to Tools -> Add-ons -> Extensions. In RealPlayer, go Tools -> Preferences -> Download & Recording and uncheck "Enable Web downloading and recording". [96] [97] [98] [99] [100]
ProCon
Prior to 1.5.2 Replaces all words on webpages with asterisks (******) if set to "censure" words. Fixed in version 1.5.2. Uninstall ProCon, restart Firefox, reset ProCon preferences in about:config, restart Firefox, reinstall. [101]
SearchStatus
All? Causes Firefox to hang for short periods. Uninstall SearchStatus [102]
SessionSaver
All Leaks memory Uninstall SessionSaver and install Session Manager [103]
Version 0.2 Causes Unresponsive Script Warning when uploading files Downgrade to version 0.2d [104]
Skype Extension for Firefox
All ? Can cause web pages to continually refresh or stop loading and Firefox may hang or become unresponsive. Can also cause errors loading direct links to images or PDF files. Disable or uninstall the extension. [105] [106] [107] [108]
Skype Web Toolbar
 ? Causes back, forward, reload and stop buttons or webpage content buttons to stop working; may also cause a blank address bar or unchanged URL when switching tabs or going to a new link. Disable or uninstall the extension. Note: The Skype Web Toolbar is no longer supported as of 15-08-2007. [109][110]
[111][112]
SwitchProxy Tool
All Causes new Firefox windows to freeze for a few seconds Disable SwitchProxy's auto-update feature [113]
Tabbrowser Extensions (TBE)
All General slowdown, conflicts with other extensions, can cause Firefox to not work at all Uninstall TBE, use Tab Mix or Tab Mix Plus instead [114]
Tabbrowser Preferences (TBP)
All (for Firefox in some languages) Gray bar below the status bar at the bottom of the screen which reads:

<button id="catTabbedButton" label="&tabprefs.label;"

Uninstall TBP [115]
1.2.8.4 Bar at the bottom of the screen which reads:

%tabprefsDTD;

Uninstall TBP and install it directly from the author's website [116] [117]
ThinkVantage Password Manager Extension
2.0 May cause Firefox to freeze for up to a few seconds when a new window is opened. Disable or uninstall the ThinkVantage Password Manager extension in Firefox via Tools -> Addons -> Extensions.
2.0 May cause a "failure in chrome registration" error when starting Firefox.
Note: In Windows Vista, exiting Firefox, right clicking the Firefox icon and selecting "Run as administrator" may resolve the issue; if not, use the workaround.
Disable or uninstall the extension (from Firefox Safe Mode if necessary) if you don't need it. Alternately, find the file tvtpwm_moz_xpi.xpi (usually in "C:\Program Files\Lenovo\Client Security Solution") and open it in Firefox to reinstall the extension. [118][119] [120][121]
2.0 Firefox crashes when opening a pop-up window. Caused by the latest Lenovo Client Security update. Disable the extension or reinstall it by opening the file tvtpwm_moz_xpi.xpi in Firefox (see above) [122] [123] [124][125]
Update Notifier
 ? A prompt for a username and password from http://mozdev.elliptic.fr/ asking "Oui?" Uninstall Update Notifier [126][127]
User Agent Switcher
Prior to 0.6.4 Reinstallation or update causes Firefox to hang Uninstall previous version in Safe Mode before installing new version [128] [129]
VeryDelicious
All Software update screen on opening windows and downloading fiiles. Uninstall VeryDelicious [130]
Wizz RSS News Reader
2.0.0 Update causes Firefox to hang Uninstall previous version in Safe Mode then install the updated version. [131]
Woot Watcher
1.0.1 (all?) Periodic Firefox hangs, slowdowns, or excessive CPU usage, possibly related to Woot Off events. Disable or uninstall the Woot Watcher extension [132] [133]
XPL LinkScanner
2.6 Causes Firefox to crash when using Yahoo, Google, or MSN Search. This extension may be installed in Firefox as part of "System Suite 8" by AvanQuest. Disable or uninstall "XPL LinkScanner Firefox 2.6" via Tools -> Add-ons -> Extensions. [134][135]

[136][137]

Yahoo! Toolbar
all? Causes excessive CPU usage Uninstall [138]