Comment 5 for bug 1791789

I've got the same behavior under 16.04

« Reinstalling the Hunspell libraries did not solve the issue »
→ go to add-ons Mozilla webpage to re-add your dictionaries ?

I only had to take care once regarding dictionary and language pack to fix that part of issue.

Whereas whatever I try about search engines list is always « reset » and reordered to a default state I don't like at each re-launch.