More threads by David Baxter PhD

David Baxter PhD

Late Founder
Q&A: Removing a Bad Add-On in Firefox
By J.D. BIERSDORFER, New York Times
April 19, 2010

Q: I recently added a bunch of extensions for Firefox, but now the browser is getting sluggish and crashing. How do I find the one thing that’s causing the problem?


A: To make sure the problem is a clashing add-on/extension, try restarting Firefox in the browser’s Safe Mode first.
  • In Windows, close the program and go into the Start menu to Programs.
  • Open the Mozilla Firefox folder.
  • Select the program icon called Mozilla Firefox (Safe Mode).
  • In the Safe Mode box, select the option to disable all add-ons and restart Firefox.
(Mac users can get to Safe Mode by holding down the Option key when Firefox restarts.)

Firefox now starts up without extensions. If the problems go away, than it is indeed likely one of those add-ons is raising a ruckus with something else in Firefox.

To figure out which extension is not playing nice, go to the Tools menu in Firefox and choose Add-ons. At the top of the Add-ons box, click on the Extensions button to see a list of everything installed. Since all the add-ons were disabled when you chose to turn them off for Safe Mode, you can now turn them back on one at a time to see which one behaves badly.

If you have a lot of add-ons, this could take a while because you have to restart Firefox each time after you re-enable an extension to see if the problem has returned. But after you start enabling and restarting, the bad add-on should become apparent and you can uninstall it from the same Extensions area of the Add-ons box.

Once you have found the problem, restart Firefox in its normal mode. The support area of Mozilla’s Web site has a document dedicated to troubleshooting Firefox extensions that has other helpful suggestions.

If the browser is still acting erratically, the culprit could be a third-party plug-in or another Firefox setting. In that case, you should concentrate on troubleshooting plug-ins or resetting Firefox’s preferences to get to the heart of the matter.
 
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