Rated 5 out of 5 stars

by darkdroid38 on Aug. 21, 2017 · permalink

step 1, read this, second post: https://support.mozilla.org/fr/questions/1120839
step 2, modify max supported version: http://kb.mozillazine.org/Editing_an_add-on_to_change_its_compatibility
Don't reenable xpinstall.signatures.required, or speeddial will be deactivated after firefox restart...