No problems here!
I have 10 add-ons including the ones you listed and none complained throughout the recent round of updates.
This is on Ubuntu 12.10 with Firefox 19.02
My own experience. When I was using it on Windows I would find extensions installed that I didn't want and hadn't requested. Then deleting them would require uninstalling whatever malware it was linked to in the task manager. I'm not aware of any such thing ever occurring on Linux.