Dia’s AI Browser is starting to add Arc’s “greatest hits” to its feature set

The AI-powered Dia web browser draws inspiration from its predecessor, Arc, an earlier foray into modernizing the web browsing experience that emerged from the startup known as The Browser Company. On Sunday, The Browser Company founder Josh Miller confirmed that the new AI browser will bring “Arc’s greatest hits” to Dia, including things like sidebar mode, and combine that with native AI features like memory and proxies.

This explanation suggests that Dia, which has since been acquired by Atlassian for $610 million, could have an advantage in the AI ​​browser race, because it builds on the company’s previous lessons from developing Arc.

The latter was initially released in mid-2023 as a reinvention of the browser designed around the way people use the internet today. This included offering separate workspaces for work and personal browsing, support for pinned tabs, a command bar that works like Apple’s Spotlight search, and a sidebar that includes a search bar, tab list, user bookmarks, voice controls, and more.

However, Arc may have tried to push the envelope even further: Miller later admitted that Arc was ultimately too complex for most people to adopt.

“Arc was simply too different, with too many new things to learn, for too little reward… Furthermore, Arc lacked cohesion in both its core features and its core values. It was experimental, and that was part of its charm, but also its complexity,” Miller wrote in a blog post earlier this year, detailing the company’s decision to retire Arc and open source it, and refocus the company’s efforts on building Dia.

But the Arc may not necessarily be a failure, even if it never becomes a widely adopted consumer product. Instead, the browser gave the company more than a year’s worth of insights into what kind of modern browser features resonate with users and which ones they don’t.

This can help the company move forward when creating the feature set for Dia.

As Miller says in a post on

Dia has already added other features from Arc’s “greatest hits,” like turning Google Meet into a picture-in-picture player automatically when you switch tabs and custom keyboard shortcuts. Miller hinted that the company is exploring how to port Arc’s Spaces — distinct browsing areas with their own set of tabs, favorites, topics, history, and cookies — to Dia. He said that the Zia team is currently testing the pinned tabs.

Additionally, Miller asked for feedback on other features to add, such as scrollable profiles and Arc Search-inspired updates to the Dia mobile app coming in 2026.

Additionally, Miller points out that Dia will be less bloated and will rely on AI for things like memory and proxies.

After the Atlassian acquisition, the browser company continues to operate independently. As a result, Miller said the company will be able to add more “browser essentials,” a reference to Arc’s favorite features, to the Dia browser. He also noted that Dia is developing deeper integrations with Atlassian’s Jira and other applications, such as Linear, under its new owner.