Thanks, any info on why this is needed? Something in the upgrade procedure breaking things??

Click above under the Title. It says 

External Link

Its no longer supported however i've had no issues with mozbackup creating saves & restoring profiles in ff or waterfox etc.Can restore the lot or just what i select.Used it around 4 months ago to revert from a balls up that i had with waterfox

http://mozbackup.jasnapaka.com/

LOL, duh, sorry always forget to look for that. So used to just seeing a link in the body of a post.

Thanks!

well with Version 55 is going to start the RE-Firefox that will end on reaching the 57 stable version

nothing will be like before especially the GUI app customization with so many addons will be put out of the games,

until now in case of any troubles they already always asked for a manual "refresh", now they decided for the hard way (actually the main trouble is not on our side but are the users losted in favour of Google Chrome)

anyway I'm now trying the version 57 Nightly and I'm very good impressed

but I really will miss my dock customizations ....

let me say that when Google Chrome came in the browsers market had not so much appeal it was only very quick

but it was very quick because it was NEW ! I mean it was a fresh install and on the other hand your beloved Firefox had a lot of addons and so many years of bookmarks and history (also the deleted addons leaved some traces)  it should be good to clean up your firefox and to try the new addons first in the portable version and only when you decided to keep them use them in the default profile.

I'm sure that after using Chrome 2\3 years you will experience much more annoyance than firefox !

That said I'm trying to recreate the dock feeling on firefox without the css styles but using the personas actually there are very much limitations but my first attempts are here >   https://addons.mozilla.org/en-US/firefox/user/frankelll/