Can I use browsh with a Firefox Fork?

[martin-braun]

I want to test Floorp or Mullvad Browser with browsh. Is it possible, if so, how?

[tombh]

See the --firefox.path string arg: https://www.brow.sh/docs/config/

[vvirtues]

Can I do this on Windows as well? doesnt seem to work for me. Getting Could not find Firefox on your registry

[martin-braun]

@tombh What about the idea to have a flag to bypass the Firefox validation checks altogether (version, registry, etc.) and try it anyways? cc @vvirtues

[tombh]

Sure, it makes sense. PRs are very welcome. I can't be sure when I'd get around to it myself.

[martin-braun]

@tombh I figured, there is no need to bypass the registry check on Windows. If someone wants to use a fork, obviously it is necessary to specify firefox.path so browsh can find the binary. Only when the argument's default value firefox is assigned to firefox.path it will attempt to resolve the path by doing which firefox on unix based systems or scan the registry for the path on Windows systems.

@vvirtues Your issue is not an issue, provide the path to the exe in the configuration. It most likely still won't work, unless the fork you are trying to use is passing the version check of browsh.

Stacktrace:

• browsh/interfacer/src/browsh/firefox_windows.go

  Line 94 in cb3ddd5

  Shutdown(errors.New("Could not find Firefox on your registry"))

• browsh/interfacer/src/browsh/firefox_windows.go

  Line 16 in cb3ddd5

  flavor := getFirefoxFlavor()

• browsh/interfacer/src/browsh/firefox.go

  Line 111 in cb3ddd5

  path = getFirefoxPath()

[Compiux]

Windows user here, hoping this will provide some useful information
I'm trying to use Mullvad Browser. I updated the path in the configuration file (config.toml) removed the firefox profile to let Browsh create a new one (which it did successfully) and installed the extension in the Mullvad Browser (did this when I ran Browsh with the --firefox.with-gui option).
For the time being, the browser is stuck on the "Waiting for firefox to connect..." step.
I'm positive the path to the browser is correct (if I use the firefox.with-gui, the mullvad browser shows, but the CMD window is stuck)

This is my command:
browsh_1.8.0_windows_amd64.exe --debug --firefox.path "C:\MullvadBrowser\Browser\mullvadbrowser.exe" --firefox.with-gui

This is the debug file content:
Looking in C:\Users\********\AppData\Roaming\browsh\config.toml for config. Attempting to connect to Firefox Marionette Starting Firefox in headless mode Using Firefox at: C:\MullvadBrowser\Browser\mullvadbrowser.exe Windows registry Firefox version: 130.0 Using default profile at: C:\Users\hicoreas\AppData\Roaming\browsh\firefox_profile FF-CONSOLE: Crash Annotation GraphicsCriticalError: |[0][GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt (t=3.69696) [GFX1-]: RenderCompositorSWGL failed mapping default framebuffer, no dt Sending WebDriver:NewSessionto Firefox Marionette SendingAddon:Installto Firefox Marionette Starting Browsh CLI client Starting websocket server... FF-MRNT: 50:{"applicationType":"gecko","marionetteProtocol":3} FF-MRNT: 1106:[1,1,{"error":"unknown error","message":"Expected absolute path: [Exception... \"Component returned failure code: 0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH) [nsIFile.initWithPath]\" nsresult: \"0x80520001 (NS_ERROR_FILE_UNRECOGNIZED_PATH)\" location: \"JS frame :: chrome://remote/content/marionette/addon.sys.mjs :: install :: line 63\" data: no]","stacktrace":"RemoteError@chrome://remote/content/shared/RemoteError.sys.mjs:8:8\nWebDriverError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:187:5\nUnknownError@chrome://remote/content/shared/webdriver/Errors.sys.mjs:736:5\ninstall@chrome://remote/content/marionette/addon.sys.mjs:65:13\nGeckoDriver.prototype.installAddon@chrome://remote/content/marionette/driver.sys.mjs:3003:21\ndespatch@chrome://remote/content/marionette/server.sys.mjs:320:40\nexecute@chrome://remote/content/marionette/server.sys.mjs:291:16\nonPacket/<@chrome://remote/content/marionette/server.sys.mjs:264:20\nonPacket@chrome://remote/content/marionette/server.sys.mjs:265:9\n_onJSONObjectReady/<@chrome://remote/content/marionette/transport.sys.mjs:496:20\n"},null] Webextension not connected. Message not sent: /tty_size,117,30 Webextension not connected. Message not sent: /tty_size,117,30 Webextension not connected. Message not sent: /tty_size,117,30 FF-MRNT: 726:[1,0,null,{"sessionId":"f06f5b69-8f39-42c6-af6a-3abf017dac6b","capabilities":{"browserName":"mullvadbrowser","browserVersion":"115.14.0","platformName":"windows","acceptInsecureCerts":false,"pageLoadStrategy":"normal","setWindowRect":true,"timeouts":{"implicit":0,"pageLoad":300000,"script":30000},"strictFileInteractability":false,"unhandledPromptBehavior":"dismiss and notify","moz:accessibilityChecks":false,"moz:buildID":"20240805090000","moz:headless":true,"moz:platformVersion":"10.0","moz:processID":5040,"moz:profile":"C:\\Users\\hicoreas\\AppData\\Roaming\\browsh\\firefox_profile","moz:shutdownTimeout":60000,"moz:useNonSpecCompliantPointerOrigin":false,"moz:webdriverClick":true,"moz:windowless":false,"proxy":{}}}]