We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

add-on install failed

more options

I reset my android phone Install Firefox from Google Play Store(version 66.0.2) Connect addons.mozilla.org Search ublock origin Touch 'Add to Firefox'

Pop-up message addons.mozilla.org this addon could not be installed because it appears to be corrupt


Connect ublock origin github/releases Download ublock origin rc4

Pop-up message github~ this addon could not be installed because it appears to be corrupt


Connect addons.mozilla.org again Tried other extension Same message pop-up


Reset my phone again Same result...

I have used Android Firefox with addons over 3 years, this is first time(addon install failed) (sorry for my lame English)

How to install add-ons?

I reset my android phone Install Firefox from Google Play Store(version 66.0.2) Connect addons.mozilla.org Search ublock origin Touch 'Add to Firefox' Pop-up message addons.mozilla.org this addon could not be installed because it appears to be corrupt Connect ublock origin github/releases Download ublock origin rc4 Pop-up message github~ this addon could not be installed because it appears to be corrupt Connect addons.mozilla.org again Tried other extension Same message pop-up Reset my phone again Same result... I have used Android Firefox with addons over 3 years, this is first time(addon install failed) (sorry for my lame English) How to install add-ons?

All Replies (2)

more options

We are currently experiencing issues with Firefox add-ons. We apologize for any inconvenience caused. A fix is on the way.

https://discourse.mozilla.org/t/certificate-issue-causing-add-ons-to-be-disabled-or-fail-to-install/39047

Thank you

more options

A workaround for Android can be found in this thread: https://support.mozilla.org/questions/1257974