Waterfox 6.7.6 adds feed controls and fixes startup hangs

Waterfox 6.7.6 adds separate controls for Live Bookmarks and direct feed URL previews, alongside new options to open original feed articles in a tab or window.

The release also adds double-click closing for ordinary tabs and fixes a startup hang tied to DNS prefetching during Ultra Protection initialization.

Other changes include Unicode 18.0 emoji support where needed, compact menu spacing, security fixes, and corrections across tabs, imports, themes and platform integration.