Yagan was one of the first to call for Brendan Eich's resignation as Mozilla CEO after it was revealed that Eich donated to the Proposition 8 campaign in 2008.
Prop. 8 was the ballot initiative that briefly banned gay marriage in California.
OkCupid users accessing the site via Mozilla's popular Firefox browser were told of Eich's donation and asked to use an alternative site. Eich has since resigned.
But Yagan also has an anti-LGBT political past, Uncrunched revealed.
In 2004, he gave $500 to Congressman Chris Cannon, who has been a staunch opponent of gay rights, the blog reported.
Mother Jones and others reported Yagan got a pass from other outlets.