We need to look at the sync logs. Note: Do the following for each problem system/profile. And label each as to what system/profile. Type ''' about:sync-log'''<enter> in the address bar.   Open the last file created and '''Copy''' its contents Now '''Paste''' it into this forum. If the file is too large; Open a text/word program and load the file. Left-click once. Now '''<Control> A''' to highlight everything, then '''<Control> C''' to copy it. Next, have your web browser go to; '''https://pastebin.com/''' Paste '''<Control> P''' the content of the file in the window. '''Note: ''' On the bottom, fill out the boxes as best you can. Now press '''Create A New Paste. ''' The page will reload. Copy the new web address, and post it here.