better support for Google Search and Firefox

v1.96.6

• better support for Firefox 96+ and fix detection of Firefox version
• LinkHints: better support for privacy.resistFingerprinting on Firefox
• Scroller: change the default duration from 100ms to 120ms, and make it configurable
  • and then it can scroll by only expected pixels (#518)
• fix some other bugs

1.96.4

• fix some found bugs, like LinkHints on Google search results
• LinkHints:
  • add activeOnCtrl for Firefox to switch meaning of Ctrl and Ctrl+Shift
  • fix some issues since Firefox 96
  • use then: string as a following command in most modes