Knowledge base entry covering sites that actively block Firefox users. Sites that _work_ but where there's an unsupported warning should use TODO instead.
Bug 1886128 Comment 0 Edit History
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Knowledge base entry covering sites that actively block Firefox users. Sites that _work_ but where there's an unsupported warning should use Bug 1886129 ([firefox-not-supported-warning](https://bugzilla.mozilla.org/show_bug.cgi?id=firefox-not-supported-warning)) instead.