Hi, ag87,
welcome to community!
Some useful points:
1) KM 75.1 is VERY outdated version, non-compatible with multiple modern web-sites and web-security requirements (SSL, TLS etc.). But if it suits your needs - OK to use it.
2) Actual version is KM 76-Goanna rolling build. It's not perfect but supported and updated almost weekly. (Goanna is the Palemoon's engine, fork of Mozil
Forum:
General