Heinz Diehl writes:
On 04.05.2019, Sam Varshavchik wrote:
> Basically, an "all your extensions are belong to us" situation.
You can enter about:config and set "xpinstall.signatures.required" to
"false" until the problem is fixed.
I am surprised that it actually worked. From what I read, I thought that
this option gets ignored in the version of Firefox that all the hoi-polloi
use, and it's enabled only in the dev/nightly Firefox builds.