I keep getting a script error when trying to load the page using webBrowser.Navigate(\"https://home.nest.com/\"). It will pull up fine from my normal internet
You should add your program name to the register HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION for using the latest feature as same as your normal internet browser.
as for me, value 8000 (0x1F40) - IE8 mode can solve many script error problem.
Ref:
Use latest version of Internet Explorer in the webbrowser control