New

• Membership commands Same Tab Group, Same Container
• Switch-within-selection commands Cycle Forward, Cycle Backward (default shortcuts Ctrl+. and Ctrl+,) and Switch to Here
• Selection command Cluster
• Option to enable vertical-oriented versions of command titles, e.g. "Add Left" -> "Add Above", ideal for users of vertical tabs

Improved

• Action button available; opens options page when clicked
• In options page, clicking a representation of a command's keyboard shortcut opens the Manage Extension Shortcuts page
• (Windows, Linux) Smart access key indication. For example, if the access key for "To the End" is "e", then the "e" in "End" is underlined, not in "the"
• Duplicates command now generates no selection if no duplicates found. Previously, the target tab always got selected

Changed

• "With Selection Text" and "With Link Text" commands now called Selected Text in Title or URL and Link Text in Title or URL
• Default access keys changed for Same Site Cluster (s), To the Start (r), All (a)

Fixed

• Right-clicking a text selection on a link broke the Select Tabs menu. Selected Text in Title or URL is now a submenu item like all other commands
• v4.1.1: Saved settings failed to load

New

• Membership commands Same Tab Group, Same Container
• Switch-within-selection commands Cycle Forward, Cycle Backward (default shortcuts Ctrl+. and Ctrl+,) and Switch to Here
• Selection command Cluster
• Option to enable vertical-oriented versions of command titles, e.g. "Add Left" -> "Add Above", ideal for users of vertical tabs

Improved

• Action button available; opens options page when clicked
• In options page, clicking a representation of a command's keyboard shortcut opens the Manage Extension Shortcuts page
• (Windows, Linux) Smart access key indication. For example, if the access key for "To the End" is "e", then the "e" in "End" is underlined, not in "the"
• Duplicates command now generates no selection if no duplicates found. Previously, the target tab always got selected

Changed

• "With Selection Text" and "With Link Text" commands now called Selected Text in Title or URL and Link Text in Title or URL
• Default access keys changed for Same Site Cluster (s), To the Start (r), All (a)

Fixed

• Right-clicking a text selection on a link broke the Select Tabs menu. Selected Text in Title or URL is now a submenu item like all other commands

Fixed

• Keyboard shortcuts did not work

New

• "With Selection/Link Text" commands, in text selection and link context menus. Link context menu also includes "Duplicates" and "Same Site".
  
• "Trail Left/Right" commands. (Requested by Cr8zyIvan)
• "All" command.
• Access keys are configurable in the options page (Windows and Linux).

Improved

• Options page displays any assigned keyboard shortcuts.
• "Same Site" command on an about: tab no longer selects reader view tabs.

Fixed

• "Duplicates" command did not work for some about: tabs.

Internal changes

• Added extensive JsDoc code documentation.
• When there is no valid command result, selection process is now aborted instead of reselecting the current selection set.
• Reworked options data storage (again).

New

• Shift+click (and Shift+<access key> in Windows/Linux) on menu command adds the new selection to the existing selection. (Thanks Zegnat)

Changed
These changes may disrupt Select Tabs' existing user experience, justifying the major version bump:

• "To the Left/Right" commands renamed "To the Start/End", and their access keys (Windows, Linux) changed from L/R to A/E.
• The way preferences are internally stored is reworked, resetting user preferences. (So please revisit your preferences.)

New

• "Add One Left/Right" commands. (Requested by aforest)

Improved

• Preferences page now has automatic dark mode.

v2.2.0
- New commands: Clear selection, Invert selection
- Commands can now be assigned keyboard shortcuts.
Thanks liljaylj!

- Revert "Parent and Descendants" removal.
- "Parent and Descendants" switches focus to the parent tab if found.
- Rename menu item group "Time-based" to "Temporal".

- Rename "Duplicate" to "Duplicates".
- Remove "Parent and Descendants". Can be replicated simply by invoking "Parent" and "Descendants".
- Update look of Options/Preferences.

NEW:
- Time-based commands.

NEW
- Individual commands can be toggled on or off in Preferences.
- "Duplicate" command.

IMPROVED
- Pinned tabs can be selected if the target tab is pinned.

FIXED
- "Same Site" didn't work for domains with ports.

v1.2.2

Exclude pinned tabs from selection, except with Parent command

v1.2a
Reverted: Pinned tabs not excluded from selection.

v1.2
Changed: Pinned tabs are excluded from selection.
Changed: Descendants command moved to above Parent.
Improved: Same Site command uses different, reasonable matching patterns for certain protocols. A file:* target selects all file:* tabs; same goes for about:* tabs; a moz-extension:* target selects tabs associated with the extension.

v1.1
Fixed: Same Site now works on about:* tabs such as new tabs and blank tabs. Selects the same type as the target tab.
Fixed: Same Site now also checks reader-view tabs for any matches.