Browser & Tab Management

Browsers and tab-management tools that aim to keep multiple workspaces / accounts / projects sane. For self-hosted bookmarks / RSS see selfhost-bookmarks-rss; for read-it-later / highlights see prod-knowledge-management-readwise; for browser extension dev see browser-extensions.

"Tab-organising" browsers

Arc Browser (The Browser Company) — free; the 2022–24 darling — sidebar tabs, Spaces, profiles. Sunset / pivot announced 2024: development is paused; the company is shipping Dia (an AI browser) instead. Existing Arc users still get security updates but no new features. Treat with caution for new setups.
Dia — paid + free tier (TBC); the new AI-flavoured browser from The Browser Company (2025). Replaces Arc. AI agents in tabs.
★ Vivaldi — free + paid Workspace; vertical tabs, tab stacks, tiling, mouse gestures, mail/calendar built-in; the kitchen-sink browser; Chromium-based.
Brave — free; Chromium with built-in ad-block + Tor mode + Brave Search; clean defaults.
Sidekick — paid + free; "browser for work"; app-sidebar.
Zen Browser — free OSS; Firefox-based with Arc-shape sidebar tabs; rising 2024–26 as the Arc replacement for FOSS users.
Floorp — free OSS; Firefox-based; tab tree + vertical tabs out of the box.

Firefox — free OSS; tree-style tabs via add-on; the privacy default.
Chrome — free; the corporate default; tab groups built-in.
Microsoft Edge — free; Chromium; Vertical Tabs, Workspaces, Collections.
Safari (Mac/iOS) — free, built-in; Tab Groups across devices; Tab Bar collapse; Reader Mode.

★ OneTab — free; one click → all tabs become a list; massively reduces memory; the 80% solution.
Workona — paid + free tier; "workspaces"; pulls Google Docs/Notion/Sheets together; team plan exists.
Toby — paid + free; visual tab boards.
Tabby Cat / Cluster Tabs — free; minimalist tab dashboards.
Session Buddy — free; classic Chrome extension; save/restore sessions.
Tree Style Tab (Firefox) — free OSS; vertical hierarchical tabs.

★ Firefox Multi-Account Containers — free; per-tab cookie isolation; the right answer for "log into 4 Gmail accounts at once." Free, OSS-flavoured.
Chrome Profiles — free, built-in; per-profile cookies/extensions/bookmarks.
Edge Profiles — same as Chrome.
Arc Spaces — sunset-status; same idea (RIP).
SessionBox — paid + free; multi-session in one window.
Browser Bear / Ghost Browser — paid; multi-session for power users.

Karakeep (formerly Hoarder) — see selfhost-bookmarks-rss; AI-tagged bookmarks; replace OneTab for "save to read later" use case.
Linkding — free OSS — see selfhost-bookmarks-rss.
Raindrop.io — free + paid; the polished hosted bookmark manager.
Pocket (Firefox) — free + paid; read-later integration with Firefox.

★ Profile per work context — separate profile for Work / Personal / Client; separate cookies, history, bookmarks. The single-best tab-sanity move.
Containers (Firefox) for multi-account inside one profile.
OneTab once a week — close all the "I'll get to it" tabs; review the OneTab list; delete most.
Don't use tabs as a todo list — that's what prod-task-gtd-apps is for; "open tab" is a poor proxy for "do this."
Vertical tabs once you pass 20 open — your screen is wider than tall.

Default privacy: Firefox + Multi-Account Containers.
Default kitchen-sink: Vivaldi.
Arc replacement (2026): Zen Browser (Firefox-based) or Vivaldi.
Built-in AI sidebar: Brave Leo or Edge Copilot.
You only need to close tabs: OneTab.
Workspace per project: Workona or Toby.
Reading later more than tab-managing: Raindrop or Karakeep — see selfhost-bookmarks-rss.
You used Arc and want continuity: Dia (when stable) or Zen.