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Firefox Multi-Account Containers wot Firefox

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wot Wužiwar Firefox 12352034, hace 5 años
I get the message -
This add-on cannot be installed as it appears to be corrupt, after the add-on is downloaded.
Please fix it ASAP

Wotmołwa wuwiwarja

je so hace 5 años napisał
There are a couple of things that can cause this. You could try https://discourse.mozilla.org/c/add-ons/add-on-support/ to troubleshoot over the forum.