re: alternate browsers, I am only aware of Midori and Skipstone, both of which only support the KT and on.
But I want to know when the heck update 3.4.2 came out for the K3.
https://s3.amazonaws.com/G7G_Firmwar...3.4.2_B008.bin
Bunch of miscellaneous fixes all over the place, not just certs:
As for the
3.4.1 update, as knc1 said, it only patched the certs (and libsoup and libcurl

).