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Firefox vs Solipsism Browser: catalog facts
Firefox	Solipsism Browser
Free Free software from a non-profit-owned foundation. Mozilla sells separate subscription…	Free Free and open source under the MPL-2.0.
Windows, macOS, Linux, Android, iOS	Android
Total Cookie Protection stops cookies following you between sites An engine that is not Chromium, which matters for the health of the web	Side rail layout suited to one-handed use Rail can sit on the left or right
A small number of sites are still built and tested only against Chromium Mozilla’s revenue comes largely from a search deal, which shapes some defaults	Relies on the system WebView for rendering Young project with a small user base
Downloadable app	Downloadable app
Open source	Open source
License: MPL-2.0	License: MPL-2.0
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.