Yes I know about the problem for Firefox 40-41-42 PLEASE do not link those threads.
I updated the Identity safe plugin for Firefox today. I already rolled back Firefox to version 39 to avoid all problems. Now the new plugins killed my identity safe on Firefox 39 as well.
The only answer I would like to see is how to I roll back the plugins or where can find the plugins archives to re-download the old version.
Thanks in advance !