COSMIC 1.0.15 Adds Support for Multiple Full-Screen Windows per Workspace

Posted by hanuca on Jun 4, 2026 4:32 AM EDT
9to5linux.com; By Marcus Nestor
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Linux hardware vendor System76 released COSMIC 1.0.15 today as the latest stable update to this Rust-based desktop environment used by default on the Pop!_OS Linux distribution.

Coming only a week after COSMIC 1.0.14, the COSMIC 1.0.15 release adds support for multiple full-screen windows per workspace, which fixes Steam’s Big Picture mode issues, improves MIME app detection in COSMIC Files, and adds a configuration option for XDG activation (focus stealing) behavior.

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