[Chromium][Opera] File:/// origin tab closes when launched in Firefox

[acornestean]

Description:
Opening a file:/// page in Firefox will close the origin tab in Opera. This does not happen in other chromium browsers (Chrome, Edge, Vivaldi).

Preconditions:
Access https://facebook.com/, for example, and locally save the page as .html

Steps to reproduce:

1. Load the Chromium Firefox Bridge v0.1 in the browser
2. Load the previously saved page in the browser
3. Open the page in Firefox or Firefox Private Browsing through whatever method (toolbar button, toolbar button context menu options, shortcuts, page context menu)
4. Notice the origin tab with the file:/// page will close upon opening in Firefox

Expected:
The origin tab should not close when the file:/// page is opened in Firefox, as per what happens in other Chromium browsers.

Actual:
The origin tab with the file:/// page closes when the page is opened in Firefox.

2024-02-21_12h32_56.mp4

[acornestean]

On macOS, I believe that due to bug #79, which prevents file:/// pages to launch in Firefox, the origin tab does not close.