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Why can't I download ad block plus. When I try to download it I get the message "The add-on could not be downloaded because of a connection failure". Solution?

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I'm trying to download ad block plus from their website and I'm getting the message The add-on could not be downloaded because of a connection failure". I don't get this issue with any other add on

I'm trying to download ad block plus from their website and I'm getting the message The add-on could not be downloaded because of a connection failure". I don't get this issue with any other add on
Attached screenshots

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Are they pointing to the Mozilla Add-ons site, or a different server?

https://addons.mozilla.org/firefox/addon/adblock-plus/

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Separate Issue; Your System Details shows;

Extensions

AdBlock for YouTube™ / YouTube™ AdBlocker 1.0 ({709836ab-3cc6-4d0f-87ac-fa1c46f6bdaf})

Adblocker for YouTube™ 1.5.0.30 ({ab2186b0-8c0b-4921-a2d4-95e6e05c0e3c})

AdBlocker for YouTube™ 0.3.2 (jid1-q4sG8pYhq8KGHs@jetpa
Having more than one version of a program may cause issues.

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Downloading from their site, you might need to disable Deceptive Content and Dangerous Software Protection in Privacy & Security.

Get the add-on from @jscher2000 recommendation above.



You are aware that Adblock Plus is an "ally of online advertising"?

5 details about AdBlock Plus every browser user should know https://www.cnet.com/news/5-details-about-adblock-plus-every-browser-user-should-know/

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The firefox extension for ad plus doesn't work for youtube. It has to be downloaded from their site https://adblockplus.org/ I tried disabling and removing all the other ad blockers and then try download it would same thing. Why is this happening?

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I am able to download and install the extension from the link you provided.

Do you have an anti-virus/anti-malware program installed? Try disabling that to see if it helps.

Also, have you tried the steps in Unable to install add-ons (extensions or themes)?

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ABP support forum has a suggested solution in a pinned topic: Download from Mozilla. They do not list a cause, but this may be a network issue. https://adblockplus.org/forum/viewtopic.php?f=1&t=22270