Isn’t a trademark only valid in a single market, eg consumer electronics vs entertainment?
Yes, Lucasfilm actually owns several trademarks on the word droid, mainly in toys, computer games, and entertainment. Interpreted broadly, these trademarks cover "smart" devices, which are generally used to interact with entertainment media.
See also the legal battle of Apple v Apple[0] (music vs computers)
[0] https://en.wikipedia.org/wiki/Apple_Corps_v_Apple_Computer
https://en.wikipedia.org/wiki/International_(Nice)_Classific...
It only becomes a problem when the hypothetical consumer becomes doormat dumb and half blind. I think that Firefox should have kept the name Phoenix, nobody would get confused by that.
For example, I'm much better served by Sandisk having a tamper-proof verification codes on their uSD cards that I can lookup on their official website and verify the card being genuine. I don't remember the last time I bought non-genuine Sandisk card from random sellers on Aliexpress after they introduced this. Yet I have a bunch of Samsung ones from China (probably fakes), and half of those are already dead.
Both are trademarked. I wish more manufacturers put more effort to creating verification schemes for end-users, rather than to suing for trademark violations.
How so? Once you have the uSD card in hand, they have your money.