Anyone accessing the popular dating site OKCupid with Firefox today is in for a surprise. Instead of the homepage, OKCupid.com is serving Firefox users with a message calling out Mozilla CEO Brendan Eich for his support of California's Proposition 8, highlighted by a $1000 donation made in 2008. "Mozilla’s new CEO, Brendan Eich, is an opponent of equal rights for gay couples," the message tells users. "We would therefore prefer that our users not use Mozilla software to access OkCupid."

It's not the first controversy the incoming CEO has faced. Last week, one of Mozilla's board members resigned over the Proposition 8 donation. (Eich responded by acknowledging their concerns, but refusing to step down.) Still, this is the strongest outcry that has come from another site, using the browser ID tags to effectively boycott the Firefox browser. The message allows OKCupid users to continue to the site via a link at the bottom, but not before they've seen download links for the other four major browsers and a very strong call to action: "Those who seek to deny love and instead enforce misery, shame, and frustration are our enemies, and we wish them nothing but failure."

Update: Mozilla has responded to OKCupid's letter with an official statement: "Mozilla supports equality for all, including marriage equality for LGBT couples. No matter who you are or who you love, everyone deserves the same rights and to be treated equally. OKcupid never reached out to us to let us know of their intentions, nor to confirm facts."