Arc browser stops working on December 22, and The Browser Company cites security
New Arc accounts closed on October 22, and Arc will be deactivated on macOS and Windows on December 22. Personal data is deleted within 30 days after.
The Browser Company says keeping a browser secure is growing work with AI, so its engineers move to Dia. On mobile, AI features and tab sync end on November 23.
Dia imports Arc passwords, bookmarks, extensions, history and tabs; Spaces become Profiles and Folders become Tab Groups.
The dates and the stated reason
The farewell page lists three dates: new accounts end on 22 October 2026, mobile AI features and sync end on 23 November, and Arc stops working on macOS and Windows on 22 December, when accounts are deactivated. The stated reason is security: browser upkeep is growing with AI, so the team is concentrating on Dia, which it says was built to current standards. Users can import into Dia or export their tabs as a list of links from Arc's advanced settings.
From anger to a switch, and the people who never got it
A user who refused to move last year gave Dia a chance after cooling off:
"Despite wanting to hate it, I like the browser a lot. You can turn off the shit AI features" — a user who had refused to switch for a year
A user who regularly tiles windows never saw the point of Arc's vertical tabs:
"if you have 2 browser windows and tile them side-by-side, suddenly 40% of your screen is wasted showing tabs on 2 windows" — a user who tiles browser windows
Replacements named in the thread: Zen, which borrowed sidebar tabs and spaces, and Orion from the Kagi team. If you rely on Arc's Spaces, check the import before 22 December, since the mapping to Profiles is the part the page promises but does not detail.
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