Waterfox 6.6.8

* Tab unloading & passkeys
- This release adds manual tab unloading (useful for freeing memory without closing tabs) and improves how unloaded tabs are represented, fixes a few import/UI issues, and includes platform specific improvements for macOS and Windows.

* General
- When importing data from another browser, empty profiles no longer appear in the selection list.
- Added an Unload Tab option to the tab context menu to free memory without closing the tab.
- Unloaded tabs now show a wireframe preview (after the tab has been active at least once).
- Fixed an issue where the Show duplicate tab menu item option did nothing on the Settings page.

* Updated search engine aliases so they no longer take over single-character shortcuts, allowing you to assign them as you wish:
- Google: @g → @go
- Bing: @b → @bi
- Ecosia: @e → @ec
- Mojeek: @m → @mo
- Qwant: @q → @qw
- Waterfox Private Search: @w → @wps

* JPEG XL images should look better (thanks to @goodusername123):
- The decoder now uses a higher quality blue noise dithering pattern to cut down on visible banding, and its upscaling step clamps overshoot to avoid haloing when enlarging images.
- Color handling is more reliable; improved ICC/CMYK processing means images with embedded color profiles should match their intended colors more consistently.
- General JPEG XL stability/performance tweaks from the upstream library: tighter buffering and math paths that should make decoding a bit smoother and less crash-prone.

* Security fixes for MFSA 2026-03

* Windows
- Windows builds now come bundled with the required Visual Studio redistributable files, meaning Waterfox will run on a fresh Windows install even if no other programs have been installed yet.
- Removed the survey checkbox from the uninstaller.