conex

this addon is still experimental and lacks hiding / showing tab containers due to https://bugzilla.mozilla.org/show_bug.cgi?id=1384515

See the experimental version in action here: conex in action

This webextension is a replacement for the discontinued TabGroups with some differences:

Functionality

it lacks the big "Manage my TabGroups" overview window
tab containers are handled like groups in the old tab groups addon
the quick search containes thumbnail of the results
the quick search includes the history

Hyper-experimental

The bug above has a first experiment that implements showing and hiding tabs -- with this, conex is pretty close to the final functionality. You can install this version of conex, but please be advised that this can break without warning, so no guarantees. In order to use conex with the hide / show functionality, do the following (instructions fuzzy as you should only do it if you know what you are doing):

enable legacy extension support in FirefoxNightly
clone https://github.com/autonome/webext-experiment-showOnlyTheseTabs
load this repos' experiment folder as a temporary addon
click the .xpi link on https://github.com/kesselborn/conex/releases/tag/v0.0.57experiment
in the addon manager, click on the settings icon on Check for Updates to get the latest version of conex
try it out ;)

Installation

For now, it's probably best to install it from the github releases page, as updates are still frequent and the official addon page depends on manual reviews by mozilla. Downloads from here will get updates automatically as well.

Tab Containers need be enabled in the preferences.

Permissions:

<all_url>: for taking screenshots for the thumbnails during search
contextMenus: for context menu for moving tab to a different container
contextualIdentities: for working with tab containers
cookies: for working with tab containers
history: for showing history results in quick search
storage: for storing thumbnails
tabs: for tab handling
unlimitedStorage: for storing thumbnails
webNavigation: for intercepting and reacting on new tabs

Contributions

are really not necessary, but as I was (to my surprise) repeatedly asked: