4.22.3 - Expand `firefox_pref` to allow URLs as VALUEs in `KEY:VALUE` pairs

Expand firefox_pref to allow URLs as VALUEs in KEY:VALUE pairs

• Expand firefox_pref="KEY:VALUE" to allow URLs as VALUEs
  --> This resolves #2386
  --> This resolves #2387
• Also: Refresh Python dependencies

What's Changed

• Expand firefox_pref to allow URLs as VALUEs in KEY:VALUE pairs by @mdmintz in #2388

Full Changelog: v4.22.2...v4.22.3