|User since||April 12, 2016|
|Number of add-ons developed||0 add-ons|
|Average rating of developer's add-ons||Not yet rated|
Rated 5 out of 5 stars
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:
...and set it to true.
могила firefox R.I.P