Firefox profile routing silently fails in v4.2.2

[xrl]

Describe the bug

Firefox profile routing doesn't work in v4.2.2 because browsers.json (embedded in the binary) doesn't include Firefox entries. The profile property is silently ignored — resolveBrowserProfileArgs can't find Firefox in the browser list and returns false, so the -P flag is never added to the command.

Firefox was added to browsers.json on main but hasn't shipped in a release yet.

Even once Firefox is in browsers.json, there's a second issue: the generated command open -a Firefox -n --args -P ProfileName URL triggers Firefox's profile chooser dialog instead of directly opening the named profile. The only approach that works reliably is --profile /full/path/to/directory instead of -P ProfileName.

Additionally, the Configuration (v4) wiki only documents the profile property for Chromium browsers and doesn't mention the args property at all, leaving Firefox users without guidance.

I wrote up a detailed gist documenting the working solution and all the dead ends: https://gist.github.com/xrl/c07ab302cfefe4a94b91c16c99c55f93

Your configuration

What you'd expect to work (doesn't):

export default {
  defaultBrowser: "Firefox",
  handlers: [
    {
      match: ["github.com/orgA*"],
      browser: {
        name: "Firefox",
        profile: "Work",
      },
    },
  ],
};

What actually works (using args to bypass the broken profile support):

export default {
  defaultBrowser: "Firefox",
  handlers: [
    {
      match: ["github.com/orgA*"],
      browser: (url) => ({
        name: "/Applications/Firefox.app",
        appType: "path",
        args: [
          "-n",
          "--args",
          "--profile",
          "/Users/USERNAME/Library/Application Support/Firefox/Profiles/abc12345.Profile 1",
          url.href,
        ],
      }),
    },
  ],
};

To Reproduce

1. Create multiple Firefox profiles (via Firefox's new profile UI)
2. Configure Finicky with browser: { name: "Firefox", profile: "MyProfile" }
3. Run open "https://example.com" from terminal
4. Enable logRequests: true and check ~/Library/Logs/Finicky/ — the debug log shows profile: "MyProfile" in "Final browser options" but the "Run command" line is just open -a Firefox https://example.com with no profile flag