** '''Why Rust?''' We're not rewriting this in Rust because the current code is well-tested and performant. The plan is to first port the C++ module from Firefox into Servo.
** Once the module is shared, work can begin on smoothing the interface and migrating piecemeal.
* New prefs parser: {{bug|1423840}}
** '''Why Rust?''' Old parser needed replacing. Well-separated component, simple interface, parses untrusted input.
=== Proposed ===