Forum response - After 66.0.4 update Add-ons appear unsupported or disappeared

If your Add-ons are appearing as unsupported or disappeared from your about:addons page please try these steps. Their data is not lost because it is stored locally on your profile directory. ([https://bugzilla.mozilla.org/show_bug.cgi?id=1549129 Bug 1549129] Bug 1549129). Re-installing the add-ons will recover the data: * Go to [https://addons.mozilla.org/firefox/ https://addons.mozilla.org/firefox/] https://addons.mozilla.org/firefox/. * Bulleted list itemSearch for your add-ons and install them individually.

If your Add-ons are appearing as unsupported or disappeared from your about:addons page please try these steps.

Their data is not lost because it is stored locally on your profile directory. (Bug 1549129 Bug 1549129). Re-installing the add-ons will recover the data:

• Go to https://addons.mozilla.org/firefox/ https://addons.mozilla.org/firefox/.
• Bulleted list itemSearch for your add-ons and install them individually.