Author Topic: "the add-on could not be downloaded because of a connection failure"  (Read 4623 times)

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Hi, when trying to download HTTPS Everywhere, any stable version (all I tested it on), I received the following notification from my Firefox Browser:
"the add-on could not be downloaded because of a connection failure"

I disabled all Avast shields for 10 minutes, and then the download worked.

What is the cause of this problem, and what is the solution, besides disabling shields temporarily?

Thanks.

Edit: I have Windows Firewall, running Windows 7, in case that is of importance in regards to this question.

Offline Asyn

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #1 on: March 30, 2015, 01:51:33 PM »
- Which Avast..? (Free/Pro/IS/Premier)
- Which version..?
- OS..? (32/64 Bit..? - which SP..?)
- Other security related software installed..?
- Which AV(s) did you use before Avast..?
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #2 on: March 30, 2015, 05:10:13 PM »
1) Which Avast..? (Free/Pro/IS/Premier)
2) Which version..?
3) OS..? (32/64 Bit..? - which SP..?)
4) Other security related software installed..?
5) Which AV(s) did you use before Avast..?

1) Free
2) 2015.10.2.2214
3) Windows 7; 64 bit; SP1
4) Windows Firewall
5) None

Offline Eddy

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #3 on: March 30, 2015, 05:18:01 PM »
Perform a clean installation of the latest avast version and see if the problem still is there:
https://forum.avast.com/index.php?topic=168680.msg1199245#msg1199245

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #4 on: March 30, 2015, 11:57:51 PM »
I did the reinstall and the problem is still there.

Offline Asyn

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #5 on: March 31, 2015, 06:34:11 AM »
Disable HTTPS-scanning in the web shield. Does it work now..?
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #6 on: March 31, 2015, 11:16:52 AM »
Yes, disabling HTTPS scanning in, 'settings -> active protection -> web-shield -> customisation', fixed the problem, thank you Asyn.

Offline Asyn

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #7 on: March 31, 2015, 11:22:30 AM »
You're welcome.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0

Offline bob3160

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #8 on: March 31, 2015, 01:49:09 PM »
In my eyes, this isn't a fix but a bypass. I've reported this to the Moderates and hope we'll get an answer as to when the problem will be fixed.
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Offline Asyn

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Re: "the add-on could not be downloaded because of a connection failure"
« Reply #9 on: April 01, 2015, 06:42:07 AM »
In my eyes, this isn't a fix but a bypass.
Yes, it's a workaround.
W8.1 [x64] - Avast Free AV 23.3.8047.BC [UI.757] - Firefox ESR 102.9 [NS/uBO/PB] - Thunderbird 102.9.1
Avast-Tools: Secure Browser 109.0 - Cleanup 23.1 - SecureLine 5.18 - DriverUpdater 23.1 - CCleaner 6.01
Avast Wissenswertes (Downloads, Anleitungen & Infos): https://forum.avast.com/index.php?topic=60523.0