Mozilla has filed a cross-complaint against Yahoo Holdings and Oath, after the latter filed against the browser maker earlier this week for dumping it as the default search engine in Firefox Quantum in the United States.
In Yahoo Holdings’ complaint, posted by Mozilla [PDF], Yahoo states that Mozilla sent a letter terminating the search agreement on November 10. Yahoo put Mozilla on breach notice, and demanded that Yahoo be restored as the default US search engine for Firefox.
“Yahoo has suffered and will continue to suffer competitive injury to its business and reputation, among other harm, and Mozilla’s material breaches and bad-faith conduct are a substantial factor in causing such harm,” the claim states.
In response, Mozilla said it exercised its contractual right to terminate the agreement, and cited providing quality search results, experience, and “what’s best for our brand” as reasons for its action.