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Waterfox

6.6.2

Fixes

Section titled “Fixes”

Theme

Section titled “Theme”
  • Tab shape has been restored to more closely resemble a physical tab.
  • Contrast between active/inactive tabs and the navigation bar is now clearer, making them easier to differentiate.
  • The active tab no longer has a blue context line at the top of the tab. You can restore it in Settings → Look & Feel → Interface Components → Tab Bar → Tab Context Line.

Waterfox previous tabs

Previous Tabs

Waterfox improved tabs

Improved tabs

  • Windows 11 users with supported hardware will now notice subtle translucency matching Windows Mica. If you prefer stronger translucency, you can use Windows Acrylic by setting widget.windows.mica.toplevel-backdrop to 2 in about:config.

Waterfox Windows 11 Light Mica

Windows 11 Light Mica

Waterfox Windows 11 Light Acrylic

Windows 11 Light Acrylic

Waterfox Windows 11 Dark Mica

Windows 11 Dark Mica

Waterfox Windows 11 Dark Acrylic

Windows 11 Dark Acrylic

Tab Groups

Section titled “Tab Groups”

What’s improved

Section titled “What’s improved”

  • New tabs stay in the right group

    • New tabs now reliably open in the same tab group as the “source” tab.
    • Placement options (after / first / last) are applied within the group, so tabs won’t “jump” out of the group at the edges.

  • Collapsing the only group works as you expect

    • If you collapse the only group in a window, the browser opens a single ungrouped tab and keeps it ungrouped so the group stays collapsed.
    • This works even if the new tab briefly inherits the group during creation.

  • “Cancel auto‑grouping” shortcut is dependable

    • The 1‑second cancel window works consistently.
    • Shortcut defaults: Alt+ on macOS, Ctrl+ on other platforms.
    • It no longer duplicates listeners across windows.
    • Backtick/backquote detection is robust across layouts (the Backquote key is recognized reliably).
    • Exact modifier matching (Ctrl vs Cmd vs Alt vs Shift) prevents accidental activations.

  • More resilient and cleaner behavior

    • Grouping is skipped for tabs that land in a different window or have no source group.
    • We clean up timers and listeners when tabs are removed or windows close.
    • Listeners are registered across all current and future browser windows.

What didn’t change

Section titled “What didn’t change”
  • Your existing tab groups and settings are preserved.
  • Pinned tabs are never moved into groups.
  • Cross‑window grouping is not attempted (only tabs in the same window are grouped).

Reminder: Preferences you can use

Section titled “Reminder: Preferences you can use”
  • Enable/disable auto grouping: browser.tabs.autoGroupNewTabs
  • Placement: browser.tabs.autoGroupNewTabs.placement (after | first | last)
  • Delay (1‑second cancel window): browser.tabs.autoGroupNewTabs.delayEnabled
  • Delay duration (ms): browser.tabs.autoGroupNewTabs.delayMs
  • Shortcut string: browser.tabs.autoGroupNewTabs.cancelShortcut

Misc

Section titled “Misc”
  • Recent history and top sites are available again in the address bar; they were disabled by accident in the previous release.
  • Linux: Middle‑click paste in the address bar works again. A single click no longer interferes with what you’ve selected elsewhere, so middle‑click pastes the text you expect. Double‑click still selects the full address Thanks @VULONKAAZ
  • This is the first release that attempts to address a long‑standing issue where, after updating, some users see an empty profile or their old profile appears hidden.