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

Installation aborted because the add-on appears to be corrupt.

  • 9 replies
  • 1 has this problem
  • 354 views
  • Last reply by Chuck H

more options

All attempts to install any addon now result in the following alert: Installation aborted because the add-on appears to be corrupt.

All attempts to install any addon now result in the following alert: Installation aborted because the add-on appears to be corrupt.

Chosen solution

Hmm, thank you for testing that.

Extension downloads redirect from one server to another. For example, this is the first and second links for uBlock Origin. Do either work for you?

Some users seem to have difficulty accessing servers whose names include CDN (a common abbreviation for content distribution network). Can you download the file in any of your other browsers?

Read this answer in context 👍 1

All Replies (9)

more options

Could you test whether Firefox can successfully download the extension file and save it to disk? Right-click the blue "Add to Firefox" button and Save Link As to save the file. Does it save successfully?

(Note: .xpi files are .zip archives, in case you wanted to look inside.)

more options

That's a negative - Shows download attempt failed.

more options

Chosen Solution

Hmm, thank you for testing that.

Extension downloads redirect from one server to another. For example, this is the first and second links for uBlock Origin. Do either work for you?

Some users seem to have difficulty accessing servers whose names include CDN (a common abbreviation for content distribution network). Can you download the file in any of your other browsers?

more options

Both work, and now so does everything else. It seems the problem solved itself. Could this have been a temporary issue with the source servers?

more options

The server was working for me, but perhaps because it is a content distribution network, we are hitting different regional data centers.

more options

Firefox is still doing this. This is very frustratrating. I have two addons out of the three that I use that will not synchronize because of this issue. Is there a workaround?

more options

Chuck H said

Firefox is still doing this.

Hi Chuck H, your Firefox can't install any new extensions because Firefox thinks they are all corrupt? Is it the current version, i.e., not a version from May 2019 or earlier?

Did you try the download step to see whether the problem is occurring there: right-click the Install button the extension's page on the Add-ons site, and use Save Link As.

more options

I will try that. I'm sorry that I didn't mention that this happened in Fedora Games and does not seem to happen as much in other Linux installs I have or in Windows so much. They all seem to reject Xtreme Download Manager and Eversync initially while allowing Lastpass to install but they will sync to Firefox eventually on other OSes except for Fedora.

I am able to download the addons directly but the problem may still between with Fedora as it seems.
more options

Sorry, please ignore the earlier issue. I was able to update Firefox and now it all works fine.