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

"This addon couldn't be downloaded because of a connection failure on [website name]" - third-party sites

more options

I know this has been reported before, but I add personal information to help troubleshoot my issue.


When I try to install addon from outside official Mozilla store, I always get this error: "This addon couldn't be downloaded because of a connection failure on [website name]". I often don't want use Mozilla's addon page because Mozilla is extremely slow to accept updates. LastPass hasn't been updated for over year, on the official website a new version of the plugin was released yesterday on March 2nd 2015. The pace of development is fast.

-Bitdefender Total Security 2015 -Firefox 36 -My Firefox add-ons: Attached screenshot shows all of them and the version numbers. YouTube Center script has been installed with Greasemonkey. -Windows 8.1 (64-bit) -I'm currently using VPN (Private Internet Access), but I also had this problem before

I know this has been reported before, but I add personal information to help troubleshoot my issue. ---------------------------------------------------------------------- When I try to install addon from outside official Mozilla store, I always get this error: "This addon couldn't be downloaded because of a connection failure on [website name]". I often don't want use Mozilla's addon page because Mozilla is extremely slow to accept updates. LastPass hasn't been updated for over year, on the official website a new version of the plugin was released yesterday on March 2nd 2015. The pace of development is fast. -Bitdefender Total Security 2015 -Firefox 36 -My Firefox add-ons: Attached screenshot shows all of them and the version numbers. YouTube Center script has been installed with Greasemonkey. -Windows 8.1 (64-bit) -I'm currently using VPN (Private Internet Access), but I also had this problem before
Attached screenshots

All Replies (10)

more options

Sorry, I don't know why paragraphing doesn't work.

more options

Many externally hosted extensions are loaded after a redirect. For example, the link on the LastPass download page is:

https://lastpass.com/download/cdn/lp_win.xpi

but when you get the install dialog (third attached screen shot), the link shows as:

https://download-do.lastpass.com/sync/lp_win.xpi

Does that second link work any better?

more options

jscher2000 said

Many externally hosted extensions are loaded after a redirect. For example, the link on the LastPass download page is: https://lastpass.com/download/cdn/lp_win.xpi but when you get the install dialog (third attached screen shot), the link shows as: https://download-do.lastpass.com/sync/lp_win.xpi Does that second link work any better?

It does work, but I made a temporary solution by downloading the extension file with another browser and installed addon from a file with Firefox.

more options

Hmm, it sounds as though either Firefox had a problem with the redirection or some external security software might have had a problem with it. If you find this same issue on another site, please post back about that one so we can explore further.

more options

I have same problem except mine involves Persona's. Last question for this in mozilla support 2 years ago with no real solution. using windows 7 computer and staying for now ( due to problems) with Mozilla FF35, cannot get my persona's to load because that error message. tried the only solutions which was to add new>string xpinstall.enabled and set value to true, it did nothing for me. I think others are also still having this problem. i sign on to personas in mozilla's theme's pick out theme i want it all looks like going to work, then gets to the page where it says add on and I get that stupid error message... any new solutions for that?

more options

Hi dobydoby, the different components of the theme are downloaded from a different server.

For example, for this theme:

https://addons.mozilla.org/firefox/addon/dark-fox-18066/

the background of the toolbar area is grabbed from:

https://addons.cdn.mozilla.net/user-media/addons/18066/1232849758499.jpg

Can you think of any filter or blocking software that would object to that URL?

Note: I just went to the site directly and didn't try to use any Persona-related add-ons.

more options

No I really have no idea, I do know that persona's works now for me if I turn off the extension/add on "Open links in new Tabs" . So I have to turn it off then restart it after changing persona's , a hassle but at least a work around...

more options

I'm not familiar with that extension. Maybe if you mention this problem to the developer he or she can update it to resolve the issue.

more options

Thank you, yes I have sent numerous emails, but still no response . I hope some resolution does come somewhere. I don't want to update to 36 since already some problems with 35 and I tried 36 and it lost my bookmarks and still trouble with personas...so will wait till that gets fixed too.

more options

Here's a list of addons I'm using: http://1drv.ms/1GClgTr