**Updates:**
- Significantly improve the "Oops!" help page that shows up for CORS errors (when browsing locally via `file://` protocol).
- Help text is now dynamically generated so that instructions only require simple copy/paste of commands.
- Auto-selects Windows-specific instructions for Windows users.
- Replace incorrect workaround suggestion for Firefox with one that actually works (previous recommended `about:config` setting was outdated and didn't work)
- Added Windows launcher scripts to help users when viewing docs via local `file://` protocol.