OkCupid has called for it’s users to boycott Firefox and use another browser to access the dating site, in protest of Mozilla’s new CEO.

Last week, Mozilla appointed long time employee Brendan Eich as CEO of the company. His promotion caused outrage both within and outside the company due to his stance on same-sex marriage. In 2012, Eich donated $1,000 to a campaign that supported California’s Proposition 8.

The site, which gets 10 million unique visitors a month, is now greeting all Firefox users with a message explaining why OkCupid’s owners feel that Eich is “an opponent of equal rights for gay couples.”

Mozilla responded to OkCupid in a public statement. A spokesperson said, “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.

“OK cupid never reached out to us to let us know of their intentions, nor to confirm facts.”

OkCupid is not entirely blocked for Mozilla users, as there is an option to continue past the message on to the main site.