Wurdearring: 5 fan de 5 stjerren

SOLUTION FOR FIREFOX 57+
Install a second version of Firefox (v.56) and deactivate the update.
Here you can find all versions:
https://ftp.mozilla.org/pub/firefox/releases/

Dizze beoardieling giet oer in eardere ferzje fan de add-on (5.2.0).  Dizze brûker hat 2 eardere beoardielingen fan dizze add-on.