Cross-Browser Tab Management Explained: Chrome, Safari, Edge & Brave

The Multi-Browser Challenge

Many professionals use multiple browsers:

• **Chrome** for development (best DevTools, extensions ecosystem)
• **Safari** for daily browsing (energy efficient on Mac, iCloud sync)
• **Edge** for Microsoft/work integrations (Teams, Office 365)
• **Brave** for privacy-conscious browsing (built-in ad blocker)

The problem? Each browser is a silo. Chrome extensions can't see Safari tabs. Safari extensions can't see Chrome tabs. You end up with 40 tabs in Chrome, 25 in Safari, and 15 in Edge — and no way to search, sort, or manage them together.

TabMaster solves this by operating at the macOS system level, outside any browser's sandbox.

How TabMaster Reads Every Browser

TabMaster uses two primary technologies to interact with browsers:

AppleScript (All 4 Browsers)

Each supported browser (Chrome, Safari, Edge, Brave) has a dedicated AppleScript (.scpt) file in TabMaster's resources. These scripts query the browser's AppleScript dictionary to enumerate:

• All open windows (with stable ordering: W1, W2, W3…)
• All tabs in each window (title, URL, index)
• The active/focused tab per window

This requires macOS Accessibility permission — you grant it once during setup.

Chrome DevTools Protocol / CDP (Chrome & Chromium)

For Chrome (and optionally Edge/Brave), TabMaster can connect via CDP WebSocket when the browser is launched with --remote-debugging-port=9222. CDP enables:

• **Live tab previews** — pixel-perfect screenshots via `Page.captureScreenshot`
• URL-based tab identification for preview caching
• Higher-fidelity tab metadata

TabMaster's preview pipeline has three tiers:

• **CDP capture** (best quality, requires debug port)
• **macOS Screen Capture API** (matches windows using title + hostname heuristics)
• **Hidden BrowserWindow fallback** (loads URL in sandboxed Electron window)

All captures are cached with a 20-second TTL and a background scanner silently refreshes up to 15 uncached tabs.

macOS Screen Recording Permission

The Screen Capture API (tier 2) requires Screen Recording permission — also granted once. Without it, TabMaster falls back to tiers 1 and 3.

Unified Features Across Browsers

Once TabMaster has access to all four browsers, every feature works cross-browser:

How Focusing Works

When you click a tab in TabMaster:

• TabMaster runs an AppleScript to **activate** the target browser application
• Sets the **target window** to front
• Sets the **active tab index** in that window
• TabMaster's popover dismisses automatically

This works across macOS Spaces (virtual desktops) — Cmd+E from Space 3, click a Safari tab on Space 1, and macOS switches you there.

The Filter System

TabMaster provides a comprehensive filter system to slice through cross-browser tab lists:

Available Filters

• **Browser**: Show only Chrome, Safari, Edge, or Brave tabs
• **Domain**: Type a domain (e.g., `github.com`) to show only matching tabs
• **Group**: Show only tabs in a specific group
• **Window**: Show tabs from a specific window (W1, W2, W3…)
• **Pinned**: Show only pinned tabs
• **Incognito**: Show only incognito/private tabs
• **Action**: Show only action-tagged tabs
• **Stash**: Show recently stashed tabs

Combining Filters

Filters stack. Example: "Show me all github.com tabs in Chrome that are in my Work group" — that's browser + domain + group combined. The focus filter (f) quickly toggles the current filter set.

Sorting

After filtering, sort results by:

• **Title** (A-Z)
• **URL / domain** (groups same-site tabs together)
• **Window** (shows spatial browser layout)

Browser-Specific Limitations

Safari

• AppleScript-only (no CDP) — previews use Screen Capture or fallback
• Incognito (Private) window tabs are accessible but may have limited metadata
• Tab close is supported via AppleScript

Chrome / Edge / Brave (Chromium)

• Full CDP support when launched with debug port
• Without debug port, AppleScript still provides full tab listing and management
• Move-between-windows works within the same Chromium browser

General

• TabMaster cannot create new tabs or navigate existing tabs to new URLs (by design — it's a manager, not a browser controller)
• Tab favicons are fetched from Google's favicon service using the tab's domain
• Window ordering (W1, W2, W3…) is stable within a session but may reset on browser restart

Using multiple browsers shouldn't mean managing them separately. TabMaster gives you one searchable, filterable, sortable view of every tab on your Mac.