Cannot launch Foxhound 114.0.2 with Playwright 1.37

[eleumasc]

When launching Foxhound with Playwright, the browser terminates immediately with the following output:

browserType.launch: Browser.enable): Browser closed.
==================== Browser output: ====================
<launching> /home/osboxes/foxhound-src/obj-tf-release/dist/bin/foxhound -no-remote -wait-for-browser -foreground -profile /tmp/playwright_firefoxdev_profile-ueZNgB -juggler-pipe -silent
<launched> pid=33916
[pid=33916][out] console.error: "Warning: unrecognized command line flag -wait-for-browser\n"
[pid=33916][out] console.error: "Warning: unrecognized command line flag -juggler-pipe\n"
[pid=33916][out] console.error: Region.sys.mjs: "Error fetching region" (new TypeError("NetworkError when attempting to fetch resource.", ""))
[pid=33916][out] console.error: Region.sys.mjs: "Failed to fetch region" (new Error("NO_RESULT", "resource://gre/modules/Region.sys.mjs", 414))
[pid=33916] <process did exit: exitCode=0, signal=null>
[pid=33916] starting temporary directories cleanup
=========================== logs ===========================
<launching> /home/osboxes/foxhound-src/obj-tf-release/dist/bin/foxhound -no-remote -wait-for-browser -foreground -profile /tmp/playwright_firefoxdev_profile-ueZNgB -juggler-pipe -silent
<launched> pid=33916
[pid=33916][out] console.error: "Warning: unrecognized command line flag -wait-for-browser\n"
[pid=33916][out] console.error: "Warning: unrecognized command line flag -juggler-pipe\n"
[pid=33916][out] console.error: Region.sys.mjs: "Error fetching region" (new TypeError("NetworkError when attempting to fetch resource.", ""))
[pid=33916][out] console.error: Region.sys.mjs: "Failed to fetch region" (new Error("NO_RESULT", "resource://gre/modules/Region.sys.mjs", 414))
[pid=33916] <process did exit: exitCode=0, signal=null>
[pid=33916] starting temporary directories cleanup
============================================================

Note: I also tried to run Foxhound with Puppeteer and the browser starts, but I need Playwright to use the page.initAddScript feature. The "equivalent" feature in Puppeteer, which is page.evaluateOnNewDocument, does not work for Firefox. I think this is because Puppeteer's page.evaluateOnNewDocument should invoke a CDP command that Firefox does not support. On the contrary, Playwright's page.initAddScript should rely on a WebDriver BiDi command supported by Firefox.

Foxhound: 114.0.2 (main: 5566a85, firefox-release: 4223211)
Playwright: 1.37.0
Puppeteer: 21.5.0
Node.js: 20.9.0
OS: Ubuntu 22.04 LTS