I'm using Linux Mint 17.1 MATE. On of the users of the computer have troubles with eyesight and seeing very small text. I increased the DPI of the whole text in
RMB > Change Desktop Background > Fonts > Details > Resolution to 132 DPI.
Still, the pages in Firefox keep displaying at the same size as on another account, configured to 96 DPI (default).
How could I permanently magnify the pages in Firefox for that specific user? Is there any better way to magnify the whole UI without changing the screen resolution?