Essentials од Pocket Atelier LLC

Essentials puts the websites you actually use behind a single toolbar button, like a Dock for Firefox. Click the icon and your sites are right there in a clean grid.

ORGANIZE WITH SPACES
Group your essentials into color-coded spaces (Personal, Work, Side Project) and switch between them with a keystroke.

FAST BY DESIGN
- A toolbar grid sized to fit your workflow, with your own rows and columns
- Real keyboard shortcuts to open any essential or toggle the popup
- Add the current tab in one click, right-click any link to add it, or drag tiles to reorder

SYNCS BETWEEN DESKTOP FIREFOX INSTALLATIONS
Sync is enabled by default, so your essentials follow you to desktop Firefox installations using the same Mozilla account. Turn it off in Essentials Settings to keep Essentials data in that Firefox installation only. Firefox normally synchronizes extension data about every ten minutes or when you choose Sync Now. The developer does not receive your synced Essentials data.

PRIVATE BY DEFAULT
No extension analytics or telemetry, no tracking, no separate Essentials account, and no developer-operated browsing-data backend. Your essentials stay in your desktop Firefox installations and in Firefox Sync tied to your Mozilla account.

ONE-TIME PURCHASE
Start with a 14-day free trial, every feature unlocked. After that, pay $4.99 once to keep every feature unlocked. No subscription. You get a license key at checkout; enter it once in the extension and you're set.