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

This text appears very often. Examples: https://addons.mozilla.org/en-US/firefox/addon/cookie-autodelete, https://addons.mozilla.org/en-US/firefox/addon/a-cookie-manager.

What the h.ll is this? Does Mozilla block some addons or has too complicated rules for addons? Is there any addon to allow installing corrupted addons? Or is there something in about:config to allow installing such addons?

What version of Firefox are you running?

Some users have difficulty installing extensions due to the redirect between the initial download address and the content distribution network (CDN). This seems to be blocked on their systems by security or filtering software.

For the first one:

Initial: https://addons.mozilla.org/firefox/downloads/file/1906813/cookie_autodelete-3.0.2-an+fx.xpi?src=dp-btn-primary

Redirects to: https://addons.cdn.mozilla.net/user-media/addons/784287/cookie_autodelete-3.0.2-an+fx.xpi?filehash=sha256%3Aec1abb6ae918a1ad63d3e878cf402dc02dde1e4470b0f4b32a3de29bc8eb003a

For the second one:

Initial: https://addons.mozilla.org/firefox/downloads/file/1121248/cookie_manager-1.5-an+fx.xpi?src=dp-btn-primary

Redirects to: https://addons.cdn.mozilla.net/user-media/addons/800416/cookie_manager-1.5-an+fx.xpi?filehash=sha256%3Afbb9fe4ea782d7d249c0f56e05b2f57d496f578840044d710172c414fc6b32f5

Are you able to access the “cdn” links?

Hi.

For both CDN i get the same. I right-click a CDN link and select open in new tab, in new tab i get this message:“F irefox
has prevented this page from asking if it can install software on your computer”.

If i go to second tab, select URL of a CDN link and tap enter, i get this “The addon downloaded from this site could not be installed because it is probably corrupted”.

That’s normal, only certain sites have built-in permission to install add-ons. You can try giving permission if you trust the source.

If you try right-click > Save Link As, can Firefox download the XPI files successfully?

Yeah, i can save it as xpi but when i move it to firefox window, i get the same message again - corrupted file.


jscher2000

    July 28

alt tedomedo:
I right-click a CDN link and select open in new tab, in new tab i get this message:“F irefox
has prevented this page from asking if it can install software on your computer”.

That’s normal, only certain sites have built-in permission to install add-ons. You can try giving permission if you trust the source.

If you try right-click > Save Link As, can Firefox download the XPI files successfully?

This problem is in the current release, Firefox 68.0.1?

Perhaps there would be a more detailed error message in the Browser Console (Ctrl+Shift+j, on Mac: Command+Shift+j). If you open that window, click the trash can at upper left to clear current messages, then try to load the file in the regular window, then switch back to the Browser Console, is there any additional information available?

These are error messages for cookie auto delete:

1564431959671 addons.xpi WARN Please specify whether you want browser_style or not in your options_ui options.

1564431959679 addons.xpi WARN Add-on CookieAutoDelete@kennydo.com is not correctly signed.

1564431959679 addons.xpi WARN Invalid XPI: signature verification failed

I set xpinstall.signatures.required back to default but it doesn’t help.

Verifying extension signatures shouldn’t be a problem in Firefox 66.0.5 or later unless that file really did get corrupted in download.

What version of Firefox are you running?

60.0.1

I don’t want newer version because newers versions “eat” more RAM. Also some good old addons aren’t compatible with newer versions.

NOW you tell me, after all this, that you are using a version that isn’t fixed?! I’m not happy you wasted so much of my time when your solution was so simple:

You can install the Extended Support Release of Firefox 60 – Firefox 60 with 9 more months of security patches – from the following page:

You’ll need to click the Firefox 60 link at the upper right of the list before downloading.

More info on ESR: https://support.mozilla.org/kb/switch-to-firefox-extended-support-release-esr

Go here: https://addons.mozilla.org/sl/firefox/addon/cookie-autodelete/versions/
Current version of Cookies Auto Delete should work for Forefox 59+. If this isn’t correct, edit text on https://addons.mozilla.org/sl/firefox/addon/cookie-autodelete/versions. Do this with current version of all addons. Of course, you’re lazy, you rather piss us off with text “can’t be install because it’s corrupted”. Such message looks more like firefox’ bug.

Hi all, a friendly reminder personal insults are not welcome on this forum per Mozilla’s Community Participation Guidelines.

I’m freezing this thread to give folks some time to cool off.

@tedomedo, this problem is patched in ESR 60.0.2. You need to upgrade to that version to get the patch. You can try to apply this patch as an extension though I’m not sure it will work on ESR.

This topic was automatically opened after 24 hours.

So you can confirm that this was Firefox’ bug?

Most extensions published before May 4th were signed with an older certificate that expired on May 4th. To use those older extensions after May 4th, you need to install a new certificate into Firefox and that substitutes for having to update every one of those extensions.

This new certificate is included in Firefox 66.0.5+, and Firefox 60 Extended Support Release 60.6.3esr+.

Some articles about why this problem occurred and what was done about it: