Note that Dissenter is not blocked by Mozilla. Gab’s extension was removed from Google’s Chrome Web Store and from addons.mozilla.org.
A Wayback Machine capture of Mozilla’s then policies:
– and related conditions of use:
- https://web.archive.org/web/20180426105057/https://www.mozilla.org/en-US/about/legal/acceptable-use/
From Mozilla and Google Chrome refuse to support Gab’s Dissenter extension for violating acceptable use policy | Packt Hub (2019-04-12), the closing paragraph:
Mozilla has not revoked the add-on’s signature, so Dissenter can be distributed while guaranteeing that the add-on is safe and can be updated automatically. Manual installation of the extension from Dissenter.com/download is also possible.
Whilst https://dissenter.com/download#download-extension no longer works – a Dissenter web site bug – users of the service can get r12 of the extension (2019-05-06) at Releases · gab-ai-inc/gab-dissenter-extension · GitHub
Alternative extensions
https://github.com/andreicristianpetcu/gab-dissenter-extension/releases/ no longer available, probably removed by the developer – not by Mozilla. For posterity (I’m not a user of the service) I have version 0.1.5 of this extension, installed 2019-05-07, in an unused profile.