There seems to be minimal information about this online, so I'm leaving this here so cooler heads can prevail in discussion.

Link to filing: https://archive.org/details/jyjfub

Notable portions:

Teixeira was hired as Chief Product Officer and was in line to become CEO.

Mr. Teixeira became Chief Product Officer (“CPO”) of Mozilla in August, 2022. During the hiring process, Mr. Teixeira had conversations with executive recruiting firm, Russell Reynolds Associates, that one of Mozilla Corporation’s hiring criteria for the CPO role was an executive that could succeed Mitchell Baker as CEO.

Also, shortly after being hired, Mr. Teixeira had conversations with Ms. Baker about being positioned as her successor.

After taking medical leave to deal with cancer, Mozilla swiftly moved to replace CEO Mitchell Baker with someone else.

Shortly before Mr. Teixeira returned from leave, Mozilla board member Laura Chambers was appointed Interim CEO of Mozilla and Ms. Baker was removed as CEO and became Executive Chair of the Board of Directors.

After returning, Teixeira was ordered to lay off 50 preselected employees, and he objected due to Mozilla not needing to cut them and their disproportionate minority status.

In a meeting with Human Resources Business Partner Joni Cassidy, Mr. Teixeira discussed his concern that people from groups underrepresented in technology, like female leaders and persons of color, were disproportionately impacted by the layoff.

... Ms. Chehak verbally reprimanded Mr. Teixeira, accusing him of violating [a] non-existent “onboarding plan” and threatening to place Mr. Teixeira back on medical leave if he did not execute the layoffs as instructed.

Mozilla's lack of inclusivity was a known problem

In February 2022, Mozilla commissioned the firm of Tiangay Kemokai Law, P.C. to assess its performance in providing a diverse, equitable, and inclusive workplace culture.

The report delivered in 2023 from Tiangay Kemokai Law, P.C. states in part: “MoCo falls into the Cultural Incapacity category based on leadership’s inadequate response to the needs of a diverse culture or else the need to create a more diverse, equitable, and inclusive culture, which is reflected in current systems, processes and procedures, policies and practices, or the lack thereof, and are incongruent with MoCo’s stated values and goals.”

Steve Teixeira has been put on leave.

On May 23, 2024, Mozilla placed Mr. Teixeira on administrative leave.

Mr. Teixeira requested a reason for being placed on administrative leave.

Mozilla did not provide Mr. Teixeira with a reason why he was placed on administrative leave.

Mozilla cut off Mr. Teixeira’s access to email, Slack messaging, and other Mozilla systems.

Mozilla instructed employees not to communicate with Mr. Teixeira about work-related matters.

Upon information and belief, an investigation into Mr. Teixeira’s allegations was finally conducted in late May 2024, but Mozilla did not do so under its internal policies and procedures regarding managing complaints of discrimination. Mr. Teixeira was not contacted to participate in the investigation into his complaint of unlawful treatment.

Coverage online so far

~~I say "alleged" because there appears to be no consensus on the veracity of this document.~~

Update: this appears to be confirmed.

This has received no "news" coverage besides one angry loudmouth (Bryan Lunduke) whose entire commentary career has been shaped by his political beliefs, regardless of truth.