I interviewed for a senior frontend end position at Adobe. The steps were a recruiter phone screen, hiring manager interview, and on site with 4 technical interviews with various team members.
They will ask a mix of knowledge based questions and coding challenges. They make you screen share and do not let you google anything. One of the interviewers asked me to use a built in function and got angry when I asked to google it because I wanted to see what the parameter format was. Some of the interviewers did not know the answers to their own questions and tried to argue incorrect answers, which I could not confirm at the time due to the screen share, but confirmed afterwards.
The worst interview I've done solely based on the attitude of the interviewers. Thankfully the interviews are with the direct team members because it will give you a glimpse of what you'll have to deal with if you get an offer.