Extensions not functioning after upgrade to Tor Browser 9
Someone in #tor said all of the extensions in their tor browser instance stopped working after the upgrade to 9.0. They had non-standard extensions installed (so I assume this is part of the cause). When they go to about:debugging, they see the below warnings:
Reading manifest: Error processing hidden: An unexpected property was found in the WebExtension manifest
Reading manifest: Error processing chrome_settings_overrides.search_provider.search_url_post_params: Unsupported on Firefox at this time
I do not see these warnings, but apparently Firefox emitted them for every extension (including noscript and https-e). The about:debugging UI shows these messages between the extension name and the "Extension ID" lines.
I don't know if we'll be able to reproduce this, but it'll be good to know if more people are having this problem.