[Feature Request] Support for Zen Browser

**Is your feature request related to a problem? Please describe.**
I am currently using Zen Browser, which is a new and popular fork of Firefox. However, the BrowserTabs plugin does not currently detect or list the open tabs from Zen Browser.

**Describe the solution you'd like**
I would like the plugin to support Zen Browser. Since Zen is based on Firefox, it likely uses a similar architecture for handling tabs and history (places.sqlite), so I hope it might be straightforward to implement by adding the relevant paths/process detection.

**Additional context**
- Browser: Zen Browser (Firefox Fork)
- OS: Windows 10/11
- Zen Browser usually stores data in: `%APPDATA%\Zen\Profiles\` (similar to Firefox)

Thank you for your hard work on this plugin!