As many of you know, Firefox is an open source project. Which means that users of this project can contribute.  Even though that’s pretty much the whole idea of project being open source, contribution brings problems with it.  Even the developer of Firefox make mistakes while putting together the application.

There are users that use Firefox for plenty of reasons with the help of add-ons. Functionalites are more than ever. Every day a new add-on is being released for a different purpose.

But most of add-ons out there don’t tend to work with Firefox in harmony. Since there are too many add-ons, it isn’t really possible to keep a record of all problematic extensions.

Link: Problematic Extensions

However, the list can help you determine if an add-on is causing a problem with your Firefox. There are also some useful links at that page which you follow to investigate your problems with Firefox.