On Thu, 2 Feb 2017, Gary Stainburn wrote: > It appears to be any <input type=button> or <button> anywhere on the page, > whether inside DIV's, Frames or not. > > They're only slightly bigger than they should be but it's enough to break page > layouts. > > I've been doing some more reading and it appears that it's something to do > with the default CSS for the web browser, as I don't have a "reset" section > at the top of my CSS. Maybe that's my fault, but the bigger picutre question > is "why does Firefox for Linux" show different to everyone else, including > Firefox on any other platform? The safe bet is, it doesn't, and it's something unique to you/your profile/your firefox configuration. Have you got an example URL that you're saying obviously misrenders in firefox? Does it still misbehave if you run firefox in safe mode with a new profile, say be doing: firefox --ProfileManager --safe-mode ? jh