Mozilla Firefox Addons Not Working FIX

When attempting to login via the Firefox addon, an error pops up: An error has occurred i is undefined leaving me completely unable to use the plugin.

I believe this issue is not related to UiPath, it's a bug at Firefox level. “This is being caused by an expired intermediary certificate used to sign Mozilla ...

I had the same problem on firefox 52, just downgrade the addon to a lower version designed for firefox 52 or less will fix this problem.

An inability to install an extension can be the result of problems with the extension, Firefox preferences, or the version of Firefox you ...

This is a problem with an expired intermediate certificate that is used to verify signed extensions that causes extensions to get disabled.

When I try to download one of these files it appears in the downloads window but immediately goes to the status Failed. Any retry fails as well. The same ...

This could occur if there is a failure during the certificate check -- all add-ons need to pass a signing certificate check in order to install.

How can I fix this problem? As a first step, you could restart Firefox with add-ons disabled (see Diagnose Firefox issues using Troubleshoot ...

I am having problems trying to install add-ons after a new installation of Firefox. The add-on I am trying to install is uBlock Origin, but I tested other add- ...

Firefox won't even start the download just instant fail. Happens to both the add-on site and other downloadable files. I haven't tried ...