sidney Firefox

Download sidney

Download sidney (current and past versions) for Firefox
Latest Version: 2.0 Updated: 7 years ago Removed

Ready to install?

sidney is available for download. Be careful when installing it.
View source code

Available versions

You can find the current and older versions of sidney here. You can download the archived versions or inspect their source codes.

As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
VersionDownloadSizeDownload countTimestamp
2.0XPI · ZIP · Source code73.47KB02019-05-13
2.0 73.47KB
2019-05-13 · 0 downloads
XPI ZIP Source code

Install XPI file

An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
  • Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  • Download the sidney ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the sidney ZIP file from step 1. sidney is now installed on your browser.

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