On 06/17/2016 06:54 PM, Sven Arvidsson wrote: > On Fri, 2016-06-17 at 18:29 +0300, Dalios wrote: >> Thanks for your effort and your feedback but I don't think that is a >> good solution for me. Maybe I should try re-installing firefox... > > That is almost never a solution on a Debian system. > > Try running Firefox with a new profile. This is most likely an > extension you installed is having problems. >
You are right! Firefox starts without errors with the "firefox" as well as the "exo-open --launch WebBrowser" command even for the first firefox window. It is weird though as all eight add-ons were installed in iceweasel for some months or at least some weeks before firefox was installed in place of iceweasel. I will now install add-ons on the new profile one-by-one to see if I can find the guilty one. Thanks for your help, Dalios