When I open firefox it opens a new tab and not my home page, the menu button shows nothing when I click it, and the back button doesn't work.
I've tried restarting, done multiple system restores and nothing works.
Solução escolhida
You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.
After your system is cleaned out,
Bookmark and use this; Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.
Settings Guard for Firefox {web link} Detects and resets changes to settings that are frequently done by add-ons and application installers.
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Solução escolhida
You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.
After your system is cleaned out,
Bookmark and use this; Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.
Settings Guard for Firefox {web link} Detects and resets changes to settings that are frequently done by add-ons and application installers.