console.log() doesn't work anymore in Firebug since Firefox 51.0.1
问题 I've just updated firefox to a Firefox 51.0.1 (32-bit), and after the update console.log stopped working. When I am tring to test some JavaScript variables using console.log() , it doesn't output anything. 回答1: As I mentioned in another answer, this happens because the Firefox internal APIs, which Firebug uses to output the data, have changed. When you open the Browser Console, you'll see the following error: TypeError: ConsoleAPIListener is not a constructor console.js:149:38 Note that, as