They fuck shit up yo.
Know what’s frustrating? Spending a solid hour figuring out why my code (for the Reader) isn’t working, when all the time the problem wasn’t even my fault. Some thing I programmed in just wouldn’t happen for some reason. Tried this, that. Nothing. Placed it here, there. Oh. It only runs if it doesn’t involve clicking a button, weird. I had been noticing the occasional “deprecated function” warning in the console, too. But I wasn’t calling that function, now was I? Hell, that ain’t even the version of jQuery I’m using. Where does that error come from?
So I traced that old jQuery version back to a browser plugin. It was loading that old version and for reasons still unknown, trying to do things whenever I clicked buttons (made an event happen). Disabled the plugin, and everything was working just fine. God damnit.
I’m not even going to go into the question of how a plugin can butch up my own scripts so badly, that’s a headache I’m not looking forward to. But I am going to say this: be mindful of what browser plugins you install. Fishy-looking developer? Nope, don’t do it. Plugin hasn’t been updated in a year? Don’t even think about touching it with a twenty-foot stick, that shit will screw you over.
Ain’t no party like a third party? Nah, I’ll show myself out now.