Kiwi still supports extensions, even if it isn't being worked on. Firefox mobile also supports Alby and Nos2x Fox extensions, though not my favorite experience... I still use nostr:nprofile1qy88wumn8ghj7mn0wvhxcmmv9uq3wamnwvaz7tmjv4kxz7fwwpexjmtpdshxuet59uq32amnwvaz7tmjv4kxz7fwv3sk6atn9e5k7tcpz9mhxue69uhkummnw3ezuamfdejj7qghwaehxw309aex2mrp0yhxummnw3ezucnpdejz7qg7waehxw309ahx7um5wgkhqatz9emk2mrvdaexgetj9ehx2ap0qyw8wumn8ghj7cm0w4h8gunfv4ejuenfv96x5ctx9e3k7mf0qyd8wumn8ghj7ctjwshxummnw3exvun9v94hxtnrdakj7qgkwaehxw309a3x2an09ehx7um5wgcjucm0d5hsz9mhwden5te0vfhhxarj9esh57npd4hjumn9wshsqgpn2m0xrvukg7f3e69jzs9jh2ur0cypps8029dmayk7qfyqgzutm5vylacy 's Spring Browser, with built-in NIP-07 signing, though it is still rough around the edges and not getting any development attention.

Don't know of any others off the top of my head.