Firefox includes a built-in PDF viewer to display PDF files inside the browser window. This article explains how to use the built-in PDF viewer, how to use another PDF viewer and how to fix the common issues you might encounter.
Firefox includes a built-in PDF viewer that allows you to view almost all PDF files found on the web without a plugin. The built-in PDF viewer is enabled by default.
|Next page||N or K or →|
|Previous page||P or J or ←|
|Zoom in||Ctrl + +command + +|
|Zoom out||Ctrl + -command + -|
|Automatic Zoom||Ctrl + 0command + 0|
|Rotate the document clockwise||R|
|Rotate counterclockwise||Shift + R|
You can use a different PDF viewer instead of the built-in PDF viewer, if you prefer. To change from using the built-in PDF viewer to another PDF viewer:
You can use a PDF plugin like Adobe Acrobat, Nitro PDF Reader or Sumatra PDF like Adobe Acrobat, MozPlugger, or KParts plugin, if one is available, to view PDF files in Firefox. If you have installed a PDF viewer plugin but you have problems using it in Firefox, try these solutions:
Your PDF plugin may be disabled in Firefox. To enable it:
Click the menu button and choose Add-ons. The Add-ons Manager tab will open.
Open your profile folder:
Click the menu button , click help and select Troubleshooting Information. The Troubleshooting Information tab will open.