Currently all links in the About Purebrowser page take you to Mozilla's website, even the link about Purism:
"Purism" link leads to Mozilla:
https://www.mozilla.org/en-US/
"Global community" leads to:
https://www.mozilla.org/credits/
"Make a donation" leads to mozilla:
https://donate.mozilla.org/en-US/?utm_source=firefox&utm_medium=referral&utm_campaign=firefox_about&utm_content=firefox_about
"Get involved" Also leads to mozilla:
https://www.mozilla.org/en-US/contribute/
"Privacy policy", takes you to Mozilla's privacy policy:
https://www.mozilla.org/en-US/privacy/
Suggestion:
Change this page and remove references to Mozilla.
At the very least the Purism link should point to: puri.sm
The get involved link could point to tracker and the pureOS source code