re: "also, the Quit+Relaunch seems to often happen immediately after copying something to the clipboard
Can you be more specific about 'something'? Text from Facebook, a picture, a video clip?"
I have since realized that this particular behavior (related to the copying to the clipboard) is not facebook related. I will start a new topic on this.
I hadn't. Just tried enabling it and can't see what it does (doesn't appear to do anything - I already had the newspaper icon in speed dial, with access to Personal News). This option does not seem to fix the link bug.
Same problem here. With version 42 on my notebook the website works. With version 43 on my desktop pc don´t. With Chrome and Firefox the same page works. Only v43 makes problems.