I've tested these in IE6, Opera6, & Mozilla 1.0
Name = "Block Browser Info in JS (Browser & OS) {7.a}"
Active = TRUE
URL = "(^local.ptron/)"
Limit = 32
Match = ".(app((Minor|)Version|Name|CodeName)|platform|useragent|"
"(|browser|system)language)1"
Replace = ".1.substr(0,0)+"NOYB""
Name = "Block Browser Info in JS (Browser History) {6.d} "
Active = TRUE
URL = "(^local.ptron/)"
Limit = 32
Match = "history.(back|length|current|next|previous|back|forward|go)1"
Replace = "history.1.substr(0,0)+"NOYB""
Just be careful with "Block Browser Info in JS (Browser & OS)" it can disable scripts..
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"Imagination is more important than knowledge" - Einstein