Window Titler от Tomasz Pamula

Window Titler
Label your windows and profiles using custom window titles.

Usage
This extension allows you to modify the Firefox window title which is visible in the operating system's window list, task switcher and in the browser's title bar. The title bar is disabled by default in Firefox but can be enabled easily.

* To invoke Window Titler click its toolbar button or use the keyboard shortcut (default: Ctrl+Alt+T).

* To specify a profile title go to the extension settings page.

Tips
* Enabling the title bar: https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars
** Tick the "Title bar" checkbox in the customisation screen.

Permissions
* The "Access recently closed tabs" permission is required to keep the window titles persistent across the browser restarts.

Feedback & contributing
This project is fully open source. Feedback: suggestions, issues, contributions and ratings help to improve the extension and are encouraged.
* Source code: https://github.com/tpamula/webextension-window-titler
* Submit a bug or a feature suggestion: https://github.com/tpamula/webextension-window-titler/issues
* Rate: https://addons.mozilla.org/en-US/firefox/addon/window-titler

Contributors
Thanks to those who contributed to this project:
* Framling (https://github.com/Framling)
* orchee (https://github.com/orchee)