Browserosaurus is a free, open-source macOS utility that intercepts every link you click and asks which browser you want to open it in — turning your fleet of installed browsers into a genuine choice rather than a habit.
What is Browserosaurus?
Browserosaurus is a tiny Mac app that sits silently in your menu bar and presents a browser-picker panel the moment any link is opened from outside a browser — from Mail, Slack, Finder, terminal output, wherever. Instead of defaulting to Safari or Chrome and then copy-pasting URLs, you get a clean, keyboard-navigable overlay listing every browser you have installed. One keypress later, the right browser opens the right link.
The concept sounds deceptively simple. In practice, it eliminates a class of friction that power users have tolerated for years: the wrong browser opening, the manual copy-paste loop, the "wait, I'm logged into the work Google account in this browser" scramble. Browserosaurus makes that a solved problem.
What does Browserosaurus do best?
Its strongest suit is zero-friction context switching — matching a link to the browser where your session, extension set, or profile already lives.
I run Chrome for Google Workspace, Firefox for personal accounts, Safari for battery-conscious browsing, and Arc for research rabbit holes. Before Browserosaurus, every external link opened in whichever browser macOS thought was my default. Now the picker appears in under 100 ms and I'm pressing a single letter to route the link where it belongs. Developers who juggle localhost environments in different browsers, or consultants who manage multiple client accounts, will feel this acutely.
- Auto-detects all installed browsers — no manual configuration of a browser list
- Keyboard shortcuts assignable to each browser for instant, mouse-free selection
- Option to set a temporary "favourite" so repetitive clicks skip the picker
- Supports browser profiles (Chrome / Edge / Brave), not just whole apps
- Fully native Swift app — minimal RAM footprint, no Electron overhead
Is Browserosaurus free?
Yes — Browserosaurus is completely free to download and use, and the full source code is on GitHub under an open-source licence.
There is no premium tier, no subscription, and no feature gating. The project is maintained by a single developer and accepts sponsorship via GitHub Sponsors if you want to show appreciation, but nothing is paywalled. You can install it via Homebrew Cask (brew install --cask browserosaurus) or download directly from the GitHub releases page.
Who should use Browserosaurus?
Anyone who regularly works across two or more browsers on the same Mac will immediately understand why this exists.
The ideal user runs Chrome for work SSO, Safari for personal tasks, and something like Firefox or Arc for development or research — and is tired of every clicked link arriving in the wrong context. It is also a natural fit for web developers who test sites across multiple engines, for IT administrators managing corporate vs. personal profiles, and for privacy-conscious users who route certain domains through a hardened Firefox while keeping a lighter browser for everyday tasks. If you only use one browser for everything, you will not feel the need; this tool is purpose-built for multi-browser households.
How does Browserosaurus compare to alternatives?
The closest comparable tool on macOS is Velja (by Sindre Sorhus), which adds a powerful rules engine — automatically routing links that match a domain or URL pattern to a specific browser without ever showing a picker. Velja is the better choice if you want set-and-forget automation; Browserosaurus is better if you prefer an explicit choice every time. OpenIn covers similar ground and also handles file-type routing beyond just URLs. For the user who values transparency and a keyboard-first workflow over automation rules, Browserosaurus wins on simplicity and the fact that its source is fully auditable. Unlike the others, it asks nothing of you — no account, no telemetry, no App Store review permission.
Compared to simply shuffling your default browser in System Settings, Browserosaurus is categorically different: you are not picking one winner permanently, you are making an informed decision at click time, every time.
What are the limitations worth knowing?
Browserosaurus must be set as your system default browser for the picker to intercept links — a necessary trade-off but one that surprises some users on first setup. The picker does not appear for links clicked inside a browser (that is by design; it only intercepts system-level opens). And because it is a solo-maintained open-source project, release cadence depends on one person's availability; the GitHub issues page is the only support channel. On balance, these are minor caveats for a utility this focused and this well-executed.
