Hi i was having the same problem and i found a solution. Be cautious and only do what i am about to tell you dont mess with any other things it can harm your computer. you also require a little patience since you have to exit the authentication required many time while you are doing this so here it goes.
1. go to the website you are having this problem with.
2. when the authentication pops up close it and quickly right click and press inspect element (Q). (keep closing Authentication if it keeps coming up work quickly)
A page on the bottom should appear with tabs that say inspector, console, debugger, style editor, profiler, and network.
3 click on debugger. on the right hand side there should be sources list find the one that has the website https://play44-player.googlecode.com. and click on it so that is the only one that appears on the left.
4. on the bottom of where it says sources there should be a an eye shape figure, this figure {} and a circle press on the circle to disable then on top sources press the icon that looks like this II it will then turn to > and the color should be blue. this just means that that that particular script has been stopped and should not appear anymore.
After that exit the webpage or if you like restart your browser and the problem should be fixed.
sorry for my poor English
Source is me i know a little about computers but i am no expert. Dont mess with what you dont know or understand so follow the instruction i am sorry i can not provide picture steps i am lazy and is to much work. Hope this Helps it did for me