Comments on: Invalid File Hash When Installing a Firefox Extension

By: Joe

Joe — Sun, 11 Apr 2010 07:03:22 +0000

After reading this and nothing was working, I took an educated guess from Chris’s information and came up with a solution. What worked for me was signing into my account on Mozilla’s addons sight. If you don’t have an account, register one, then sign in.

By: Firefox: come risolvere l’errore dell’hash non valido - Geekissimo

Firefox: come risolvere l’errore dell’hash non valido - Geekissimo — Tue, 24 Mar 2009 11:00:37 +0000

[...] Via | Cybernet [...]

By: Nikki

Nikki — Sat, 21 Feb 2009 05:15:14 +0000

The “enable third party cookies” did it for me. Yay! Thank you so much, guys!

By: marius

marius — Sat, 07 Feb 2009 00:38:29 +0000

i’ve tried everything that you’ve written here, even “solutions” from mozzila, nothing works. I’ve disabled ESET smart security, spybot search and destroy, deleted the 3 files, allowed cookies, everything. No result. I even reinstalled firefox. Still, no result. And i have Windows XP SP3 up to date. I’m starting to lose my patience and throw my pc out on the window x(

By: Wendy

Wendy — Sun, 19 Oct 2008 06:28:49 +0000

I have to say that TEO’s post about deleting the extensions files worked like a charm. Thanks so much!

By: Chris

Chris — Tue, 02 Sep 2008 14:21:26 +0000

I had the same problem downloading the extension. I noticed that when I did a “right-click, save-as” to try saving the .xpi file to disk, I instead got a file called ‘login’. It’s as if the login didn’t work, and it’s trying to get my to login in again. Making a new profile, logging in there, right-clicking and saving the .xpi to disk from there and then loading it in the original profile worked for me.

By: Ryan

Ryan — Mon, 04 Aug 2008 20:43:09 +0000

Tommy wrote:

Enabling third party cookies did it for me as well… add that to your list !

Thanks, we’ve added it to the list since more than one person has confirmed this as a possible problem.

By: Tommy

Tommy — Mon, 04 Aug 2008 13:03:44 +0000

Enabling third party cookies did it for me as well… add that to your list !

By: Ryan

Ryan — Thu, 31 Jul 2008 21:36:41 +0000

Clark wrote:

After trying all of the above unsuccessfully, I traced through the linked bug and found a suggestion to enable 3rd party cookies (which I had disabled). That was the trick for me - it installed fine after I did that.

Thanks for the info Clark! Glad you got it installed.

By: Clark

Clark — Thu, 31 Jul 2008 16:56:38 +0000

After trying all of the above unsuccessfully, I traced through the linked bug and found a suggestion to enable 3rd party cookies (which I had disabled). That was the trick for me – it installed fine after I did that.