YouTube Grid Simple от GGyo245

A simple Firefox extension that lets you set YouTube grid columns (2–8) on Home and main feed pages, hide Shorts shelves, and hide in-feed sponsored/ad tiles.

Release notes (0.1.5)

• Show a refresh hint when the popup cannot connect to the YouTube page

Release notes (0.1.4)

• Limit the add-on to YouTube Home and main feed pages only (reduced match patterns).
• Match the popup UI theme to YouTube dark/light mode.
• Hide in-feed sponsored/ad tiles on supported pages.
• Polish the popup UI (cleaner button, no reserved status space, clearer slider fill).

Source code:
https://github.com/GGyo245/firefox-youtube-grid-columns