1st Firefox

Download 1st

By: Westin
Download 1st (current and past versions) for Firefox
Latest Version: 1.0 Updated: 6 years ago Removed

Ready to install?

1st is available for download. Be careful when installing it.
View source code

Available versions

You can find the current and older versions of 1st 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
1.0XPI · ZIP · Source code2.51MB02020-07-12
1.0 2.51MB
2020-07-12 · 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 1st ZIP file.
  • In Firefox browser, go to about:addons to open Add-ons Manager
  • Click on ⚙, Install Add-on From File
  • Select the 1st ZIP file from step 1. 1st is now installed on your browser.

Best 1st Alternatives

Here are some Firefox add-ons that are similar to 1st:

Clean Colors
nanatoretta
- 0.00 (0)
Yet pale
iDeen
- 0.00 (0)
Colourfulla Stripes
SnapCloud
- 0.00 (0)
New Colors
Second-G
- 0.00 (0)
Colour thing
laurafranx
1 0.00 (0)
Extremely Colorful 1
iam_violet
- 0.00 (0)
one colour
ausrora
- 0.00 (0)
Full Color
Rocker_Beriman
- 0.00 (0)
color pattern 1
muffinizer1
- 0.00 (0)