How to Install an Extension from a Local File in Firefox

This guide will show you how to install an extension from a local file (such as .zip, .crx, or .xpi) in Firefox.

  1. Download the extension file as a .xpi file. If you have a .zip, extract it first.
  2. Open Firefox and enter about:debugging#/runtime/this-firefox in the address bar.
  3. Click Load Temporary Add-onโ€ฆ.
  4. Select the .xpi file, or if you have a folder, select the manifest.json file inside the extension folder.
  5. The extension will be installed temporarily (until you restart Firefox).
Note: Firefox only allows temporary installation from local files. For permanent installation, use the official store when available.

Tip: Always be careful when installing extensions from outside the official store. Only use files from trusted sources.