> pageActions can now be shown and/or hidden automatically for specific pages via pattern matching using the “hide_matches” and “show_matches” manifest properti

> pageActions can now be shown and/or hidden automatically for specific pages via pattern matching using the “hide_matches” and “show_matches” manifest properties. This is a nice performance win for users. When writing an extension that shows a page action only for certain domains/URLs, this allows to replace about 15 lines of javascript code with a single line in manifest.json. Nice!