Using Firefox to manage my Joomla site, I notice that the Admin Tools management page is rendering differently to the way it does in Chrome.
Screenshots of Firefox and Chrome attached.
In Firefox, the buttons in the Admin Tools page are stretched the full width of the page. They do work, but it is much harder to use, and also the graphs, etc are not displayed.
The page in Firefox looks like how it might render on a phone, but it renders like this regardless of screen width. Also, Chrome does not display like this, even when the window is made very narrow. (I haven't tested on an actual phone device though).
The page used to render correctly in firefox, but it was a number of months ago, I'm not sure which version would have introduced the stylesheet changes that triggered this issue.