[Bug]: extension not opening correctly. (only in Floorp 11.20.0 (64-bit) But not FF 128.4.0esr (64-bit))

[whitevamp]

Pre-Submission Checklist

• [X] I have checked the existing/closed issues to ensure this issue has not already been reported.
• [X] I am using the latest supported version of the browser.
• [ ] I have tried disabling all browser extensions/add-ons to rule out interference from these.
• [X] I have tried clearing the browser cache and cookies.
• [X] I have checked with a new profile and the issue still occurs.
• [X] I have provided detailed step-by-step instructions on how to reproduce the issue.
• [X] I have included relevant screenshots or console outputs.
• [X] I have checked that this problem is not occurring in the latest version of Firefox ESR.
• [X] This issue is specific to this browser and does not occur in other browsers.

Bug Summary

I use an extension called Read Aloud and one of the options is show in new window, but in Floorp this grabs the very first tab that has been opened up and uses that tab as the reader window.

Reproduction Steps

1. Install Read Allowed, from https://addons.mozilla.org/en-US/firefox/addon/read-aloud/
2. set the option to show in new window.
3. hit the icon to start the reader.

Expected Behavior

Should open a separate window with no toolbar, or anything other than the Minimize, Enlarge, and close buttons in the upper right-hand corner.

Actual Behavior

Floorp grabs the very first tab that has been opened up and uses that tab as the reader window.

Screenshots

This is what it should look like, as well as what it does look like.

Browser Version

11.20.0 (64-bit)

Operating System

23H2 (22631.4317)

Additional Context

No response