4.20.0 - Upgrade `selenium` and Mobile Mode

Upgrade selenium and Mobile Mode

• Upgrade to selenium 4.14.0
  --> This resolves #2174
• Modernize Mobile Mode
  --> This resolves #2170
  --> This resolves #2169
• Add "--ftrace" to "SB()" command-line options
  --> This resolves #2171
• Refactor UC Mode

What's Changed

• Upgrade selenium and Mobile Mode by @mdmintz in #2175

Full Changelog: v4.19.2...v4.20.0