This statement is a fabrication. She was trained and worked as a lawyer. She went to Berkeley, not to study computer science or electrical engineering, but to study law. She graduated and went to a San Francisco law firm that specialized in intellectual property and had many clients in Silicon Valley. She eventually left and worked for Sun in the legal department. Netscape recruited her to help set up their legal department and that is how she became an executive at a technology company. She stayed at Netscape when it was bought by AOL to work on policy issues, but was eventually fired during a series of layoffs.
The only "foundational" piece of Mozilla she authored was the Mozilla Public License.
Any company that lost that much market share would have fired their CEO. At a minimum, she should take a deep pay cut and her compensation needs to be tied to performance.