Arc will stop working on macOS and Windows on December 22, 2026. This is a deadline to move your browsing setup, not simply a warning that new features are ending.
The Browser Company's farewell notice says existing desktop users will receive basic updates until then. New accounts closed on October 22. Mobile users have an earlier boundary: on November 23, Arc Search loses sign-in, tab sync and AI features.
For desktop tabs, the company provides an export to a list of links. On Mac, use Arc's Settings, then Advanced and Export Data. On Windows, look under Advanced for Export Spaces and tabs. Complete the export before the desktop cutoff. The company also offers direct import into its replacement browser, Dia.
Keep a copy before choosing a replacement
The useful distinction is between preserving access to your sites and recreating your working environment. A list of links gives you somewhere to start. Don't assume it is a complete backup of passwords, extensions, history or every preference merely because the button says Export Data.
Open the saved file and check a handful of links that matter to you. Include an everyday work site, something buried in a folder and a page you haven't visited recently. If those are difficult to find, reorganizing a small essential set now is more useful than discovering the problem during a rushed move.
Keep the export somewhere private that you control. A browsing collection can reveal projects, personal interests and account destinations even when it contains no passwords. There is no need to upload it to an unfamiliar conversion service just to inspect it.
You also don't need to make preserving your tabs conditional on liking Dia. Save the links first, then evaluate the destination separately. A shutdown announcement should set the migration deadline, not make the replacement decision for you.
Check the habits you actually depend on
Dia's October 22 Windows 1.3.0 release notes describe Windows–Mac sync, Focus Mode that hides browser controls, and an option to open new sidebar tabs at the top. Those are concrete features to examine if you're considering the suggested move, rather than treating visual familiarity as proof that everything will behave the same.
Try a normal task in your proposed replacement before making it your default. Check whether you can find the right account, reopen an important group of pages and use any extension essential to that task. For a managed work computer, follow your organization's browser and account policies rather than importing work material into an unapproved setup.
Put the relevant cutoff in your calendar, but do the first export now. Leave enough time to discover what needs rebuilding while the old browser is still available.