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Can't install addon in Ungoogled Chromium
(lemmy.ml)
This is the community to discuss about browsers.
Open Source browsers
Closed Source browsers
List will be updated
Not sure on how to bypass it, but Ungoogled Chromium doesn't let you do that for a reason. They explain it on their website, or Github
What about the Chrome Web Store extension? That should let you install from the webstore.