[stuzenz]

Hearing good things about firefox performance vs. chrome in this thread, I thought I would have a look at firefox use of rust - I found this informative page which provides a lot of rationale for where rust has been used: https://wiki.mozilla.org/Oxidation

Here is a cut of what was introduced in Firefox 76 (copy&paste)

Integrate fluent-rs, a localization system: bug 1560038 (shipped in Firefox 76)

Why Rust? Performance and memory wins are substantial over previous JS implementation. It brings zero-copy parsing, and memory savvy resolving of localization strings. It also paves the way for migrating the rest of the Fluent APIs away from JS which is required for Fission.