Google explains JavaScript execution on non-200 HTTP status codes

Google noted that if the HTTP status code is non-200 (for example, on error pages with 404 status code), rendering might be skipped.

Google says don’t use JavaScript to generate a noindex tag in the original page code

Google updated its JavaScript SEO basics documentation to clarify that may skip rendering and JavaScript execution.

Google Warns Noindex Can Block JavaScript From Running

Google updated its JavaScript SEO documentation to clarify that noindex tags may prevent rendering and JavaScript execution, ...
How-To Geek on MSN

How to make your first WebExtension that works in Chrome, Firefox, and beyond

In Chrome, go to chrome://extensions/, enable Developer mode using the toggle in the top-right, then click the “Load unpacked ...