The Browser Company just rolled out Dia 1.57.0 on Mac and version 1.6.0 on Windows with the one feature stubborn Arc holdouts have been begging for since day one. You can now nest tab groups up to eight levels deep on both platforms and pick whether new links open inside those tucked-away folders.

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Just last week, we noted that nested folders were still missing when the team added link routing and theme dials ahead of Arc’s December shutdown. Moving your old setup over is also less painful today since the Arc importer finally brings along all your unpinned tabs alongside pinned ones and favorites.

Over on Reddit, folks were so surprised to see proper folder nesting that some asked if it required the unofficial DiaTweaks tool before realizing it was baked into the stock browser.

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Still, not everyone on X is ready to forgive and forget, with user Not Jimin cheekily remarking, “So you killed Arc to implement its features into Dia and call it an update.”

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Beyond tab hoarding, this update leans right into Atlassian CEO Mike Cannon-Brookes’ philosophy of building a workplace doer instead of a casual browser. Both Mac and Windows users can now drop Word, Excel, and PowerPoint files straight into Chat to get quick summaries without opening those apps. I tested this out briefly with a spreadsheet and a Word document, and it worked as advertised.

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Figma integration is also out of beta for everyone now, letting you search through design files, FigJam boards, and slides or catch up on comments. On Mac, the assistant can even fill in a Slides template or turn a chat thread into a FigJam diagram for you.

Meanwhile, Windows users got a big round of hover preview upgrades in version 1.6.0, letting you peek at calendar events to join meetings, scroll through Morning Brief checklists, and preview collapsed tab groups or split panes.

The Windows app can also clean up inactive tabs daily, save webpages as PDFs from Chat, and snap windows when dragging the sidebar, while Mac users get a fix for app sign-ins that used to kick you over to Safari.

There are plenty of other small tweaks and changes here and there on both platforms. For those interested, the full changelog is here.

 
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PiunikaWeb’s Take

Watching The Browser Company slowly rebuild Arc inside Dia is equal parts funny and frustrating, though bringing back nested folders and unpinned tab imports removes a huge roadblock for power users before next month’s deadline.

Even so, commenters in the Windows update thread are still complaining that the app “runs very clunky” on their machines, while vocal holdouts on X keep asking to disable the AI completely. Packing in Office file readers and Figma tools makes total sense for corporate teams, but Dia still needs to iron out Windows performance and let regular users hide the chatbot if it wants a smooth takeover.

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Dwayne Cubbins
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I cover fast-moving stories across apps, online platforms, and everyday tech — phones, wearables, consoles, and whatever else people are fighting with this week. Bugs, rollouts, scams, policy enforcement, and the occasional internet-culture rabbit hole are all fair game. My goal is simple — make confusing tech news readable. When I'm not working, I'm working out or chilling with my dog. Got a tip? You can find me on X @dcubbins.