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add extension is impossible

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I have the last Firefox version and am trying to add extensions (e.g. video download helper). When I click on Add to Firefox, it works at loading the extension, but without any success. The blue dot in the gray square dances and dances and dances.... Thanks !!

I have the last Firefox version and am trying to add extensions (e.g. video download helper). When I click on Add to Firefox, it works at loading the extension, but without any success. The blue dot in the gray square dances and dances and dances.... Thanks !!
Attached screenshots

All Replies (6)

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You need to contact their Addon developer for support for issues using their software.

Helpful?

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Sorry, but it doesn't solve my issue, as all extensions behave the same way : I can't add them.

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What OS? I have no issues with install. see screenshot

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I am under MacOS Sonoma 14.5, and my Firefow version is 133.0.3.

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Hi

Is this a personal copy of Firefox on a personal device (as opposed to one from an employer or organisation)?

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Hi, Thank you all for your time. It is a personal copy of Firefox on my personal computer (MacBook Pro M1 14").

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Sual ver

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