Time Viewer for YouTube Live per Kody

Firefox Extension for Viewing Time on YouTube Live.

Features:
- Display video publishing time.
- Display "real" time on seek bar and chat.

Source code and issues: https://github.com/mkody/ff-youtube-live-time-viewer
This is a port of this Chrome extension by fiahfy: https://chromewebstore.google.com/detail/time-viewer-for-youtube-l/cnllmiliafeacdmlngaofjpjaljoolpc