Why my "Plug-Ins" window reappear every time I open Firefox?

It is only a nuisance, but becomes aggravating after several occurrences repeated, while I'm working on sometning. My response: why my "Plug-Ins" window reappear everytime I open Firefox? summarizes and completely describes the problem.

You can delete the files extensions.* (extensions.rdf, extensions.cache, extensions.ini, extensions.sqlite) and compatibility.ini in the Firefox profile folder to reset the extensions registry. New files will be created if necessary.

See "extension corrupted files": http://kb.mozillazine.org/Unable_to_install_themes_or_extensions

If you see disabled extensions are not compatible on the next departure in "tools > Modules > Extensions" and then click "Find updates" to do a compatibility check.

You may also need to 'Reset all the preferences for the default user of Firefox' at the start of Firefox to solve the issues in Safe Mode window.

Tags: Firefox

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