My old Firefox - w/ Persona, Bookmarks, etc, has disappeared - should I do "Firefox Refresh" , or what?

Question

I can open FF but I just get a "new" screen. In my efforts to retrieve the old I have a "Old Firefox Data" icon on the desktop but
even in that it imports only the websites I've gone to since the old browser disappeared.

Answer 1

no idea are this things connected about committed Physical memory
Past: (a week or so)
https://fud.community.services.support.microsoft.com/Fud/FileDownloadHandler.ashx?fid=4ec37519-12ee-4bab-97d8-7954fa3cd2b0
Today:
https://fud.community.services.support.microsoft.com /Fud/FileDownloadHandler.ashx?fid=9ec72884-4aff-400f-a8ea-24051a9016eb
this picture was taken 3-4 hours back, new it is 12,3/13,8GB, & its with firefox, is it normal or is one of the add causing it, to fix 1 issue i tried refresh, but it did not work then i overwrote the files with old files what were created with refresh (the issue i tried to fix with refresh got solved somehow), then i manually downloaded https-everywhere newest version, + HTML5 Add-on what u will see on this picture:
https://fud.community.services.support.microsoft.com/Fud/FileDownloadHandler.ashx?fid=ece94450-f791-48f4-a31d-44f00295a632
is the thing with committed Physical memory normal or does this means Physical memory leaks? & is it connected with https-everywhere or some other add, or with me overwriting files or did windows update have that effect, or is it normal?
13,8 shows limit, as i understand it, but if the limiter also changes, isn't it strange?
or is it cause i am connected to the Sync server or how to call it, browser connected to Mozilla acc, can that cause problems to?
also widows (or Firefox) instead of increasing the maximum Committed, the limit it should overwrite (or clean) old page files, so far it seems to have done it & i use same pages for weeks & yesterday the way Committed is used changed, no longer overwrites, i imagine if i watch videos with out sleep a month or 2 my Harddrive would be full of Virtual memory, more the Committed limit increases the more Harddrive space it takes & it grows with each video i watch, i closed browser once so it reset, new its 2,4/13,7BG, but it increases later on