Latest Version:
1.0 Updated:
5 years ago Removed
Ready to install?
Halcyon is available for download. Be careful when installing it.
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Available versions
You can find the current and older versions of Halcyon 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 |
|---|---|---|---|---|
| 1.0 | XPI · ZIP · Source code | 7.43KB | 0 | 2021-08-31 |
1.0 7.43KB
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 Halcyon ZIP file.
- In Firefox browser, go to
about:addonsto open Add-ons Manager - Click on ⚙, Install Add-on From File

- Select the Halcyon ZIP file from step 1. Halcyon is now installed on your browser.
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