And Mozilla, its parent organisation, appears to be using the situation to get Firefox users to enable an option within the Preferences that will "Allow Firefox to install and run studies". The bug report page for the issue is here.
The Firefox disabled extensions patch requires the Studies feature to be enabled. However, you can't seem to be able to activate Studies without also allowing Firefox to send telemetry to Mozilla. Not good. pic.twitter.com/mv5k1wtwGf— Costin Raiu (@craiu) May 5, 2019
In a blog post, which was last updated at 00.54 EDT on 5 May (3pm AEDT on 5 May) Mozilla said: "To provide this fix on short notice, we are using the Studies system. This system is enabled by default, and no action is needed unless Studies have been disabled. Firefox users can check if they have Studies enabled."
Preferences which could enable Mozilla to collect data on users have been disabled in the version of Firefox which this writer uses; it is provided by the Debian GNU/Linux project and is an extended support release.
iTWire was pointed to the blog post which does not state the correct reason why the extensions have been disabled, merely saying:
"Late on Friday, 3 May, we became aware of an issue with Firefox that prevented existing and new add-ons from running or being installed. We are very sorry for the inconvenience caused to people who use Firefox."
Mozilla has promised to issue fixes, adding that those for the Android and ESR versions would take longer than for others.
"There are a number of work-arounds being discussed in the community," the blog post said. "These are not recommended as they may conflict with fixes we are deploying. We’ll let you know when further updates are available that we recommend, and appreciate your patience."