Download agar.io

Download agar.io (current and past versions) for Firefox
agar.io is available to install from Firefox Browser Add-ons and for download from this page. It has 2 daily users. The latest version is 2.0, and it was last updated 6 years ago.
View source code
Total download count: 0 (Only count downloads from Firefox-Stats)

Available versions

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

As a free user, you can only download the latest version.

Upgrade to download older versions
Version Download Size Download count Timestamp
2.0 XPI · ZIP · Source code 282.12K 0 2025-03-04

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.

  1. Simply drag-and-drop the XPI into Firefox to install the add-on.

Install ZIP file

  1. Download and unpack the agar.io ZIP file to a directory of your choice.
  2. In Chrome browser, go to chrome://extensions
  3. Enable Developer mode.
  4. Click on the Load Unpacked button.
  5. Select the directory of with the unpacked agar.io ZIP file from step 1. agar.io is now installed on your browser.

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