The newer versions of Firefox include a PDF viewer enabled by default when you install or upgrade the browser. There is no need to install an add-on or use an external application to open PDF files on ...

Unlike other browsers, Firefox only uses internal settings to select a PDF viewer. Open the "Firefox" menu, click "Options" and open "Applications." Scroll down to "Portable Document Format (PDF)." ...

Dealing with an Adobe Acrobat PDF file that you have to edit, sign and return can still be a pain, even on modern browsers. Mozilla’s Firefox 106 release, however, says it solved the problem, with ...

Mozilla's Firefox 156 is available today, and its two headline performance improvements are the result of specific engineering choices worth understanding: a PDF viewer that pre-warms its background ...