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

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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.

Giải pháp được chọn

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.

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Phần bổ trợ đã cài đặt

  • Shockwave Flash 31.0 r0

Ứng dụng

  • Chuỗi đại diện người dùng: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:62.0) Gecko/20100101 Firefox/62.0

Thông tin chi tiết

WestEnd 60 giải pháp 5387 câu trả lời
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Could be server problem did you try at nights to download again?

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

Người tạo câu hỏi

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
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17571 giải pháp 158915 câu trả lời
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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 giải pháp 5 câu trả lời
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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
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8788 giải pháp 71869 câu trả lời
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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 giải pháp 5 câu trả lời
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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
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8788 giải pháp 71869 câu trả lời
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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 giải pháp 5 câu trả lời
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Same thing as you (I think) see attch

Same thing as you (I think) see attch
jscher2000
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8788 giải pháp 71869 câu trả lời
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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 giải pháp 5 câu trả lời
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That seemed to work. No error. How do I install it?

That seemed to work. No error. How do I install it?
jscher2000
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8788 giải pháp 71869 câu trả lời
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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...".

Giải pháp được chọn

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.