[firefox] Check your page info window

Hi,

A bug was filed by :aryx to report that several languages have
truncation issues with the page info windows (right click on a web
page -> View Page Info).

Note that the width of this window is localizable, so you can fix it
by increasing the width number.
https://transvision.mozfr.org/string/?entity=browser/browser/pageInfo.ftl:page-info-window.style&repo=gecko_strings

Example. From:

width: 425px; min-height: 550px;

To

width: 600px; min-height: 550px;

Since the window's width persist once changed, at least on macOS, you
should test this on a new profile.

Francesco