Mercury -
Compiler optimized, private Firefox fork.


Firefox fork for Linux and Windows named after Firefox's version control system, Mercurial, and the liquid element No. 80.

Highlights  Bulb Icon


  This nets a 8-20% performance improvement over vanilla Firefox, depending on the benchmark and OS. See for a detailed overview of all modifications compared to vanilla Firefox regarding performance, security and useability.
  See also : Thorium & ThoriumOS


InstallationHard Drive Icon

The Linux releases come in a tarball and a .deb package. For Windows, there are .zips and .exe installers. To use the .tar.gz:

tar -xvf mercury-versionnumber.tar.gz &&
You can create a .desktop file using
the sample one provided in the tarball.

Thanks for using Mercury!    Code Of Conduct/Privacy Policy: CoC  Badge Icons

Info Icon Credits: HuMaNs ⚧    404 Test Page: blah  Sad Tab    Dad's Old Site:

Mercury Mascot

"Mechanical Grass" Canvas2D Demo