For Mac OS users, there is a system setting that may not allow you to tab onto several types of elements in a web page. To change this setting:
The California State Seal of Biliteracy (SSB), became effective January 1, 2012. This program recognizes high school graduates who have attained proficiency in English and in at least one other world language by high school graduation. The State Seal of Biliteracy is awarded by the State Superintendent of Public Instruction in accordance with specified criteria set forth in Assembly Bill (AB) 815 (Brownley, Chapter 618, Statutes of 2011), which was amended in 2017 per AB 1142.