Firefox Web Extension “selectionchange”

问题

I'm trying to write cross browser Web Extension.

Based on selected value on web page I want to create appropriate entry in context menu. I created a sample code to check if browser is entering to Event Listener. In Chrome it's all working fine, but in firefox following code is not being executed.

console.log("Content script entry");
document.addEventListener('selectionchange', function() {
    debugger;
    console.log("CS Add Event");
 });

Could you please help?

Best regards

Frank

回答1:

I believe selectionchange is still hidden behind a flag in Firefox... open up about:config and search for dom.select_events.enabled ... it defaults to false, change it to true and restart the browser and give it another whirl.

来源：https://stackoverflow.com/questions/40059087/firefox-web-extension-selectionchange