MERCURY ▀ EXPERIMENTAL FIREFOX BUILD

MERCURY ▀ EXPERIMENTAL FIREFOX BUILD

UPDATED ON: 2023-08-02
Benchmarks and fixes added.

Currently i’m using [IceWeasel] browser.
Quite satisfied with it in terms of web surfing, but there are a bunch of problems related to no-so correct GPU-acceleration,
which works fine in original Firefox. Some visual JS scripts feel laggy, YT tearing is also showing it’s teeth.

Couple of days ago i’ve stumbled upon interesting Firefox fork named [Mercury] .
Browser claims to be around 8-20% faster than stock version of Firefox.
Main features of Mercury are:

  • heavy [compiler optimizations]
  • security patches taken from other various Firefox forks like IceCat,LibreWolf and WaterFox
  • awful icon logo [somehow reminded me [Mull browser for Android] , which have the same problem]
  • … and of course telemetry is removed out-of-the-box

I’ve decided to give it a try and report back after field testing.

Author of browser provides JS benchmark as a proof of performance benefit of Mercury browser over the stock one.
You can find it [here] . Testbed machine: [Xeon E5-2696v4] / 64Gb DDR4.

Here are 10 passes of Js benchmark and averaged median for complete maturity.
Throwing [Supermium 117] [which is based on actual heavily debloated chrome] results in here just for comparision.

# Iceweasel 116 x64
runs/min
Mercury 115.1 x64
runs/min
Supermium 117 x64
runs/min
1 99.78 118.4 132.3
2 106.1 126.7 136.6
3 104.7 129.7 136.9
4 98.18 126.3 133.7
5 103.0 123.6 135.5
6 101.2 123.0 132.6
7 98.47 125.8 133.7
8 98.51 127.8 133.0
9 89.59 124.3 132.1
10 104.0 123.8 138.3
Arithmetic Mean
Iceweasel 116 x64 Mercury 115.1 x64 Supermium 117 x64
100 ± 3.4% 125 ± 2.2% 134 ± 1.2%

As we can observe performance boost is quite significant and Mercury is a clear winner here.

Considering results it looks like i’m going to switch to Firefox Mercury in a while.