Intent to ship: URLPattern

[Ed Guloien]

Hello,
I intend to enable URLPattern for all channels as of Firefox 142 (and I
may be able to get nightly-only in 141, TBD).

Pref: `dom.urlpattern.enabled`
Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1948295
WHATWG standard: https://urlpattern.spec.whatwg.org/

Status in other browsers is:
* Chrome: since v95
* Safari: currently in safari preview

Cheers,
Ed Guloien (edgul)