Thorium Desktop reader v3.5.1-beta.1

Thorium Desktop reader version 3.5.1-beta.1 was published on 01 September 2026.

Here is a link to the "technical" changelog:

v3.5.0...v3.5.1-beta.1

Summary: adds optional margin page-break indicators, fixes PDF typeface, adds support for PAC proxy with Windows registry auto-discovery support, fixes app GUI font and ReadiumCSS preview typeface.

Expand the 'Assets' section below to reveal the download links.

• Note that the terms x64 and amd64 in the filenames refer to the Intel computer architecture (also sometimes known as x86_64, which includes both Intel and AMD chipsets).
• The term arm64 refers to modern ARM hardware including Apple Silicon "M" computers.

If in doubt:

• Apple users should download the arm64 variant.
• Windows / Linux users should download the x64 / amd64 variants, respectively.

The application was built automatically on GitHub (Microsoft) servers. The build was recorded here: build job: https://github.com/edrlab/thorium-reader/actions/runs/33455831380