Chrome 142 removed the--load-extension option AND the workaround

Specifically, Chrome-branded Chromium removed the--load-extension option in Chrome 142 and the workaround, which was--disable-features=DisableLoadExtensionCommandLineSwitch. (This doesn't affect Chrome-for-Testing, unbranded Chromium, or other Chromium browsers such as Brave.) Note that Chrome extensions are used for various functionality, such as auth proxy, the Recorder, and other major features!

Required reading on the situation:

SeleniumHQ/selenium#15788

https://support.google.com/chrome/a/answer/7679408?sjid=11437610768047552203-NA#chromeBrsrE137

https://groups.google.com/a/chromium.org/g/chromium-extensions/c/aEHdhDZ-V0E/m/UWP4-k32AgAJ

https://chromium.googlesource.com/chromium/src/+/290ed8046692651ce76088914750cb659b65fb17%5E%21/chrome/browser/extensions/extension_service.cc

Obviously, this is a major problem. Many users (including myself) use UC Mode / CDP Mode with an authenticated proxy, which is set via extension. Going to need to find a workaround for this.

Previously, there was also this ticket for this:#3771, but there was a workaround that made things work again:#3778. Looks like the workaround for that one was removed, so I'll need to find another workaround.