Latest Version:
2.0 Updated:
7 years ago Removed
Ready to install?
Alien is available for download. Be careful when installing it.
Available versions
You can find the current and older versions of Alien 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
| Version | Download | Size | Download count | Timestamp |
|---|---|---|---|---|
| 2.0 | XPI · ZIP · Source code | 21.27KB | 0 | 2019-05-13 |
2.0 21.27KB
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 Alien ZIP file.
- In Firefox browser, go to
about:addonsto open Add-ons Manager - Click on ⚙, Install Add-on From File

- Select the Alien ZIP file from step 1. Alien is now installed on your browser.
Best Alien Alternatives
Here are some Firefox add-ons that are similar to Alien: