Can a Safari App Extension inject a JS or CSS file into a tab, dynamically, like the WebBrowser API's tabs.executeScript function? I know Safari Extensions didn't have this capability. Although there were the two functions below
safari.extension.addContentScript
safari.extension.addContentScriptFromURL
But those functions would not execute the script and acted like an update to the content scripts in the Info.plist. I'd like to see a function that executes a script on a specifc tab.