X
Tap here to go to the mobile version of the site.

Support Forum

Get the error "add-on could not be downloaded because of a connection failure"

Posted

I attempted to download the Alexa Toolbar extension. At first Firefox blocked the download so I said allow. Then it showed it downloading before saying "add-on could not be downloaded because of a connection failure. I know this is not my antivirus because I have disabled web download scanning and it still did not work.

I attempted to download the Alexa Toolbar extension. At first Firefox blocked the download so I said allow. Then it showed it downloading before saying "add-on could not be downloaded because of a connection failure. I know this is not my antivirus because I have disabled web download scanning and it still did not work.

Chosen solution

I'm not exactly sure if someone has already posted it (I kinda started ignoring the emails since people starting talking about someone elses problem) but if you download the xpi file in another browser then open the file with Firefox it should let you install.

Read this answer in context 0

Additional System Details

Installed Plug-ins

  • Shockwave Flash 31.0 r0

Application

  • User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0

More Information

WestEnd
  • Top 25 Contributor
60 solutions 5366 answers

Could be server problem did you try at nights to download again?

Could be server problem did you try at nights to download again?

Question owner

WestEnd said

Could be server problem did you try at nights to download again?

It did not.

''WestEnd [[#answer-1163734|said]]'' <blockquote> Could be server problem did you try at nights to download again? </blockquote> It did not.
cor-el
  • Top 10 Contributor
  • Moderator
17413 solutions 157295 answers

No problems here.

Does this link work?

You can try to use "Save Link As" in the right-click context menu and install the extension locally via the cogwheel button on the about:addons page.


In Firefox 56+ the "Warn me when web sites try to redirect or reload the page" setting can no longer be found in Options/Preferences. You can modify this pref on the about:config page to enable or disable this feature

You can open the about:config page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue.

No problems here. Does this link work? *https://addons.mozilla.org/firefox/downloads/file/779541/alexacom_toolbar-1.1-an+fx.xpi You can try to use "Save Link As" in the right-click context menu and install the extension locally via the cogwheel button on the about:addons page. ---- In Firefox 56+ the "Warn me when web sites try to redirect or reload the page" setting can no longer be found in Options/Preferences. You can modify this pref on the <b>about:config</b> page to enable or disable this feature *http://kb.mozillazine.org/accessibility.blockautorefresh You can open the <b>about:config</b> page via the location/address bar. You can accept the warning and click "I accept the risk!" to continue. *http://kb.mozillazine.org/about:config
dhogan01 0 solutions 5 answers

I can download the Alexa tool extension fine. I get this message when trying to download Ad Remover from adremover.org. One thing I have noticed in Tools - Web Developer - Console there is a message regarding Content Security Policy stating "Directive 'child-srv' has been deprecated." and to use either 'worker-src' or 'frame-src.' I am in over my head at this point.

I can download the Alexa tool extension fine. I get this message when trying to download Ad Remover from adremover.org. One thing I have noticed in Tools - Web Developer - Console there is a message regarding Content Security Policy stating "Directive 'child-srv' has been deprecated." and to use either 'worker-src' or 'frame-src.' I am in over my head at this point.
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Hi dhogan01, "Certificate issuer is not built-in" sounds like a secure connection problem, not a CSP problem (that's probably from something else). What if you try that address directly:

https://assets.adremover.org/browser_extension/firefox_webext/ad_remover_org-latest.xpi

If your Firefox has problems making secure connections, please STOP and we need to figure that out now, as you may have malware intercepting your browsing.

If you get a connection error page, it's usually one of these things:

Hopefully one of those will get you either the solution, or enough background to give us more details on the problem. Thanks.

Hi dhogan01, "Certificate issuer is not built-in" sounds like a secure connection problem, not a CSP problem (that's probably from something else). What if you try that address directly: https://assets.adremover.org/browser_extension/firefox_webext/ad_remover_org-latest.xpi If your Firefox has problems making secure connections, please STOP and we need to figure that out now, as you may have malware intercepting your browsing. If you get a connection error page, it's usually one of these things: * "Your connection is not secure" -- page generally has an "Advanced" button to get more technical information. ** [[What do the security warning codes mean?]] ** [[How to troubleshoot "Your connection is not secure" error codes on secure websites]] * "Secure Connection Failed" -- typically has scantier information about the problem and if the padlock appears normally, can be taken to mean "connection failed" ** [[Troubleshoot the "Secure Connection Failed" error message]] Hopefully one of those will get you either the solution, or enough background to give us more details on the problem. Thanks.
dhogan01 0 solutions 5 answers

I get the same message when I try the link. (see attch) How would connecting to this site be different than others--like the Alexa one?

I get the same message when I try the link. (see attch) How would connecting to this site be different than others--like the Alexa one?
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

They use CloudFlare. Could that be a factor?

What kind of response do you get for this URL:

https://assets.adremover.org/browser_extension/firefox_webext/nosuchpage.html

I get "Access Denied" twice followed by various gibberish. Do see that or something else?

They use CloudFlare. Could that be a factor? What kind of response do you get for this URL: https://assets.adremover.org/browser_extension/firefox_webext/nosuchpage.html I get "Access Denied" twice followed by various gibberish. Do see that or something else?
dhogan01 0 solutions 5 answers

Same thing as you (I think) see attch

Same thing as you (I think) see attch
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

Well, Firefox 64 doesn't have that structured view, but it seems to be the same content, yes.

I don't know why that address "works" but the .xpi link doesn't. Can you right-click > Save Link As on it?

https://assets.adremover.org/browser_extension/firefox_webext/ad_remover_org-latest.xpi

If an error page is saved, you would need to change the extension (.txt is safe) to view its contents.

Well, Firefox 64 doesn't have that structured view, but it seems to be the same content, yes. I don't know why that address "works" but the .xpi link doesn't. Can you right-click > Save Link As on it? https://assets.adremover.org/browser_extension/firefox_webext/ad_remover_org-latest.xpi If an error page is saved, you would need to change the extension (.txt is safe) to view its contents.
dhogan01 0 solutions 5 answers

That seemed to work. No error. How do I install it?

That seemed to work. No error. How do I install it?
jscher2000
  • Top 10 Contributor
8634 solutions 70618 answers

To sideload an extension from a saved .xpi file, you can try this:

Open the Add-ons page using either:

  • Ctrl+Shift+a (Mac: Command+Shift+a)
  • "3-bar" menu button (or Tools menu) > Add-ons
  • type or paste about:addons in the address bar and press Enter/Return

In the left column of the Add-ons page, click Extensions.

Then on the right side look for a button with a gear/wheel/cog icon, click that to drop a menu, and click "Install Add-on from file...".

To sideload an extension from a saved .xpi file, you can try this: Open the Add-ons page using either: * Ctrl+Shift+a (Mac: Command+Shift+a) * "3-bar" menu button (or Tools menu) > Add-ons * type or paste '''about:addons''' in the address bar and press Enter/Return In the left column of the Add-ons page, click Extensions. Then on the right side look for a button with a gear/wheel/cog icon, click that to drop a menu, and click "Install Add-on from file...".

Chosen Solution

I'm not exactly sure if someone has already posted it (I kinda started ignoring the emails since people starting talking about someone elses problem) but if you download the xpi file in another browser then open the file with Firefox it should let you install.

I'm not exactly sure if someone has already posted it (I kinda started ignoring the emails since people starting talking about someone elses problem) but if you download the xpi file in another browser then open the file with Firefox it should let you install.