Rated 5 out of 5 stars

by wefgdevr on May 27, 2018 ·

for 56

It means you've got some add-ons that are not multiprocess compatible or are not WebExtensions.

This restriction is reversible. To do so go to about:config, look for the setting:

extensions.allow-non-mpc-extensions

...and set it to true.

p s
могила firefox R.I.P