Implemented speech command experiment. Must have the following set to `true` in about:config:

media.webspeech.recognition.enable
media.webspeech.recognition.force_enable

Default keyboard shortcut to enable: Ctrl+Shift+M (Cmd+Shift+M for Mac)

Dialog will appear with suggestions for spoken commands which can switch windows, open full view window, history back/forward, filter tabs in "all" menu. Permission will be asked to use your microphone. Note that command listening will only be active briefly. After expiration a new requests can be made using the same keyboard shortcut.

This is just a proof-of-concept, and may not be especially useful depending on your workflow. For details regarding how your audio is privately handled by Mozilla see:

https://wiki.mozilla.org/Web_Speech_API_-_Speech_Recognition

Fixed bug where "recent" history was not persisted correctly across Firefox restarts.

Fixed bug which caused tabs count to not be displayed.

Implemented throttling strategy for bulk reloading of tabs to mitigate browser choking when large numbers of tabs are reloaded.

Implemented workaround for FF bug 1511756 so proper titles will be displayed when reloading suspended tabs.

Removed console dump.

Fixed bug which nullified 1.2.39 update Favicon caching optimization.

Optimized messaging techniques for more efficient data transfer to UI components
Optimized data transfer to UI components by caching large Favicon data URLs.

Fixed bug created in 1.2.37 update where clicking on search result for a
suspended tab item in multi-window mode didn't always work

Rapid update, please see version 1.2.37 release notes:
https://addons.mozilla.org/en-US/firefox/addon/all-tabs-helper/versions/

Selection of maximum disk cache size (for searching suspended tabs) –
Options > Filter/Search

Eliminated memory caching of text when searching suspended tabs. (Memory
caching holds the text of all (now un-suspended) tabs in memory the first
time a search is done. Loaded tabs are still memory cached.)

The point of this change is to be consistent with the fact that users suspend
tabs to free up memory. If users feel an option to also not memory cache
loaded tabs would be useful, please contact me allassopraise@gmail.com

Added "Icon underscore" to color-bar options in Container tabs support options.

Re-instated "Show remaining tabs in "recent" menu"
Fixed bugs in keyboard shortcut assignment UI
Container properties assignment dialog now loads previously assigned properties on opening

Adjusted rapid-fire throttling of tab content text caching to a longer value to minimize redundant caching.

Fixed broken tracking that was added in 1.2.34 release.

Rapid release, see https://addons.mozilla.org/en-US/firefox/addon/all-tabs-helper/versions/
for complete version history.

Added "Container group color/name" item to context menu

This is a workaround til bugs 1386673, 1663547 get fixed. Invokes a UI allowing the user explicit assignment of name and color to the container group of the hovered container tab. Will assign all tabs belonging to the same group.

Added tracking device for tabs content text caching.

Rapid release, see https://addons.mozilla.org/en-US/firefox/addon/all-tabs-helper/versions/
for complete version history.

Due to Firefox bugs 1663547 and 1386673, the features that support Firefox Container tabs is now in a limited capacity, in order to not risk data loss that might occur.

ATH will recognize whether a tab is a Container tab or not, however will not be able to distinguish which group it belongs to.

If using option, all container tabs will be decorated with the same color (blue). Container name in the meta popup will be "Container".

If using option, typing "c:" will restrict filtering to all container tabs. "c:" must not have any text immediately after the colon, or no results will appear. (eg, don't type "c:work".)

I'm sorry for the inconvenience. When these bugs get fixed ATH will resume full Container tabs support.

https://bugzilla.mozilla.org/show_bug.cgi?id=1663547
https://bugzilla.mozilla.org/show_bug.cgi?id=1386673

Bugfix for 1.2.31 update

Rapid-fire update, please see https://addons.mozilla.org/en-US/firefox/addon/all-tabs-helper/versions/ for changelogs of previous updates.

Implemented caching text on disk so suspended tabs can be searched – opt-in – Experimental
Fixed bug where container tab item decoration didn't always work after single tab update
Made changes in menu data handling
Fixed anomalies in search mode UI

Rapid-fire update, please see https://addons.mozilla.org/en-US/firefox/addon/all-tabs-helper/versions/ for changelogs of previous updates.

Fixed bug where sites using animate favicon or title updates could increase resource usage.

Increased left and right color bar thicknesses to 3px on Container tab item decoration

Fix bug from 1.2.27 update

Implemented Containers filter (c:) for "search" mode

Added more options for color bar decorating of Container tab items.
(See Preferences > Appearance > Support Firefox "Containers" feature)

Added Firefox Containers feature support:

Option to decorate tab items with corresponding color bar.
Tab meta hover popup will display container name
Enable in Preferences > Appearance > Support Firefox "Containers" feature

Ability to filter tab items by Container name using "c:" field encoding
Enable and see detailed instruction in Preferences > Filter/Search

Improved support for Tabs Bar context menu.
See options and details in Preferences > Tabs Bar Context Menu

Various bug fixes on 1.2.24 update.

Some refactoring of the extended listing order addition from the last update.
Default is now to sustain setting, with temporary sort optional. Also some
improvements on menu handling when switching between listing orders,
attempting to keep the active tab in view.

Extended sort order/"lexiconicize" option. Can now also sort according to sites,
with tabs sorted lexicographically within each site group. If you choose, you
can also sustain settings, retaining the sort mode until explicitly changing.

See Preferences > ATH UI Context Menu > 'Sorting options of "all" menu UI items'
for settings and more details on how this works.

Improved keyboard shortcuts UI, all shortcuts including window-focus commands are
incorporated in a single dialog, accessible from Preferences or window rename popups.

The UI now has provision to prevent creating conflicts.

Added "Sort by title" and "Sort by url" items to the ATH context menu.
These can be enabled by selecting the "Sort alltabs UI items" preference.

Major refactoring of code which handles management of tab events and changes
Major refactoring of code which handles menu display
These changes hope to give better performance, particularly when the sidebar UI
is used in several windows.

Added pin/unpin tab/selected tabs to ATH context menu (Enable in ATH Preferences)
Added "lexiconicize" to ATH context menu (Enable in ATH Preferences)

Several context menu items are now optional
(View ATH Preferences > ATH UI Context Menu to see additions)

Added ability to assign keyboard shortcuts to switch windows (multi-window mode)
UI is available via button in the "window rename" dialog, as well as in ATH Preferences
("Window rename" dialog is accessible by right-clicking on a window title)

Restructuring of how multi-window mode is handled:

The "w" window button will now always be accessible in the menu, whether multi-window mode is enabled or not. This will provide the option of switching to multi-window and back. This will always enable the feature globally.

"Full View Window" will function independently of the global setting, and the user can switch between showing tabs in individual windows, or all windows. This is accessible from the "window" button.