This Mac-Only Web Browser Turns the Internet into Slack


Screenshot: SigmaOS

A horizontal list of tabs used to work a decade ago, when we didn’t all live in our web browsers. These days, however, the browser has turned into its own mini-OS, with most of our work and play coming to the Internet through this window. Companies like Google and Microsoft know this, adding tab groups and vertical tabs in recent updates. But those improvements aren’t enough at best, they help bridge the gap between the Internet and how we use it now. It’s time for a complete rethink, so you should look at SigmaOS.

SigmaOS A fast, Mac-only browser with a custom, workspace-style UI. Think of it like Slack or Microsoft Teams, but for web browsing (and yes, it supports Chrome extensions). It may sound strange, but this new way of accessing the Internet works surprisingly well.

Browse in workspaces, not tabs

You start by creating high-level workspacessay, one for work, one for chat, one for research, and one for entertainment. Then, you add pages to each, which appear in a vertical list. You can group these pages, and even rename some. Pin the most important pages to the top and you’ll never lose them again.


The browser shines when it comes to workflow. You can navigate workspaces and tabs using keyboard shortcuts. For example, use Command+1 to open the first workspace, then use the arrow keys to navigate between open tabs.

The search tool also speeds things up: Press the space bar, and a floating Spotlight-like search bar will appear. Here, you can search and switch between any open tabs, or you can launch a new tab. You can also search and enter commands here (for example, if you want to browse in split screen).

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SigmaOS also supports Chrome extensions

SigmaOS is a strange beast among browsers. It’s written using Apple’s native WebKit engine, so it works really well on Apple Silicon Macs, yet it also supports Chrome extensions. (turns out, you can do Have your cake and eat it too.) You can bring up all the Chrome extensions that won’t work on Safari, but still use all the passwords you have saved in your Apple Keychain. Ad-blocking is built-in and on by default. If you’re frustrated by Safari’s limitations, but don’t want to use Chrome (or a Chromium-based browser), SigmaOS is worth a look.

SigmaOS’s free tier is more than enough for most users, giving you access to three workspaces, but if you want more features, like cross-device sync and unlimited workspaces, it’ll cost you $8 (yes, browser It’s weird to pay for, but here we are).

If you decide to give SigmaOS a try, my last piece of advice is to hang in there while you work through the start-up wizard. It’s a long-winded setup that will ask you to import bookmarks, and you need to be prepared to make it your default browser to enter (it’s easy to switch back later if you need to). But if you get through the initial setup and tutorial, it could change the way you view the Internetliterally.

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