Unable to install add-ons (extensions or themes)

2019年5月4日 — We became aware of an issue with Firefox that prevented existing and new add-ons from running or being installed.

2024年3月30日 — Every time I try to install any addon, it shows me Installation aborted because the add-on appears to be corrupt. warning. I can't find any information ...

2019年3月7日 — Firefox addon error: This add-on could not be installed because it appears to be corrupt ... I am struggling with the firefox installation.

2019年5月3日 — This is a problem with an expired intermediate certificate that is used to verify signed extensions that causes extensions to get disabled.

2021年5月29日 — Add-ons can cause issues in Firefox. This article provides more information on how you can troubleshoot Firefox issues related to add-ons.

2018年12月14日 — What happened? New to firefox, I tried to install some cool add-ons but failed to install any except for one (zotero).

2021年3月31日 — This article describes various reasons that would cause an add-on not to be able to be installed and what you can do to fix the issue.

2024年5月21日 — 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, ...

2023年6月30日 — 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.

For Firefox versions 57 - 60, please install this extension to fix the issue. If you are running Firefox versions 61 – 65 and 1) did not receive the deployed ...