Dating site OkCupid on Monday called on users to dump Mozilla's popular Firefox Web browser in response to the appointment of a new CEO who supported Proposition 8, California's 2008 voter-approved constitutional amendment restricting marriage to heterosexual couples. Proposition 8 stood until last year, when the Supreme Court left in place a lower court ruling knocking it down.

Mozilla co-founder and Javascript creator Brendan Eich was named Mozilla CEO on March 24.

Eich's ascent prompted a backlash over his $1,000 donation to the campaign to approve Proposition 8.

Multiple employees publicly asked Eich to step down and at least one developer has said it will no longer develop apps for the browser.

According to the Wall Street Journal blog, three of the Mozilla Foundation's six board members have quit over the decision.

OkCupid users accessing the site via Firefox were greeted Monday with the following message: “Hello there, Mozilla Firefox user. Pardon this interruption of your OkCupid experience. Mozilla's new CEO, Brendan Eich, is an opponent of equal rights for gay couples. We would therefore prefer that our users not use Mozilla software to access OkCupid.”

OkCupid President Christian Rudder told the AP that 8 percent of the site's users are gay or lesbian and that approximately 3 billion monthly page views come through Firefox.

In a blog post, Eich said he wanted to express his “sorrow at having caused pain.” And over the weekend, Mozilla reiterated its support for marriage equality.

(Related: After naming Prop 8 backer as CEO, Mozilla says it supports gay marriage.)