Why do my appearance add-ons disappear and my custom home page revert to default whenever I close Firefox?
These items work fine and stay functional when I keep the browser open, but as soon as I close it, then open it later, the appearance add-ons disappear from my add-ons list and my home page reverts to the default.
Soluzione scelta
If you do not keep changes after a restart then see:
Some security software has virtualization or sandbox features that may cause problems by protecting and restoring files in the Firefox profile folder.
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It is possible that there is a problem with the file(s) that store the extensions registry.
Delete the files extensions.* (e.g. extensions.sqlite, extensions.ini, extensions.cache) and compatibility.ini in the Firefox profile folder to reset the extensions registry.
https://support.mozilla.org/kb/Profiles New files will be created when required.
See "Corrupt extension files":
http://kb.mozillazine.org/Unable_to_install_themes_or_extensions https://support.mozilla.org/kb/Unable+to+install+add-ons
Soluzione scelta
If you do not keep changes after a restart then see:
Some security software has virtualization or sandbox features that may cause problems by protecting and restoring files in the Firefox profile folder.