Verdict: Partly
Partly. Autodesk lists Windows, macOS and web browser as the supported platforms for Fusion, so it does run in a Linux browser. The catch is that browser access needs a commercial or education licence, so the free personal use plan does not get it.
Fusion has no Linux installer. Autodesk's system requirements page lists Windows 11 and macOS 14 or newer for the installed program, and there is no Linux entry.
The same page lists a third supported platform, which is browser access. It asks for an HTML-5 browser such as Chrome, Firefox, Safari or Edge, a mouse or trackpad and a reasonable connection, and none of that is a problem on Linux. But the licence line on that page is the part that decides it for most home users. Autodesk states that a commercial or verified education entitlement is required for browser access. If you are on Fusion for personal use, which is the free hobbyist plan, the browser route is not open to you.
So the answer depends on who you are. A student with a verified education licence, or someone paying a commercial subscription, can work in Fusion on Linux through a browser. A hobbyist on the free plan cannot, and should plan to keep a Windows machine or move to different software.
Your designs are stored in Autodesk's cloud rather than as files on your disk, which helps. If you are leaving Fusion, open each design and export it to STEP for solid geometry or STL for printing before you go. FreeCAD reads STEP well and is the closest free parametric modeller, though it is rougher than Fusion and the sketch and constraint workflow will need relearning.
The nearest free equivalent, with sketches, constraints, a design history and workbenches for CAM and 3D printing. Rougher than Fusion and slower to learn.
Your files: Imports STEP and IGES exports from Fusion. Cannot open Fusion's own cloud designs directly, and imported parts arrive without editable history.
For simple parametric parts and 3D printing where you would rather set numbers than draw. Not a general replacement.
Your files: No Fusion format support. Exports STL and reads DXF outlines.
Only relevant if your Fusion work was visual rather than mechanical. Excellent for renders and animation, useless for dimensioned parts.
Your files: Imports STL and OBJ. Not suitable for STEP-based engineering work.
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