Firefox 19 comes with a built-in PDF viewer. It looks like this:
Although I like this new feature, because it works fast and looks smooth, you might want to disable it for whatever reason (for example, if the full PDF is not rendered perfectly) . Read below to see how.
Type the following in the address bar:
Note: If you are using about:config for the first time, Firefox will warn you to be careful. Continue with the warning.
Type "pdf" in the search bar. Find "pdfjs.disabled" parameter and set it to true.
That's it! The built-in PDF viewer in Firefox will be disabled.
See the following video tutorial:
Share with us your opinion about the new PDF viewer in Firefox. Do you like it or not?
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4 thoughts on “How to disable the built-in PDF viewer in Firefox”
Also I’ve found that the quality of printing via the built in viewer is unacceptable. The content is distorted by the JPEG compression and the headers and footers is added by default like in the regular HTML printing.