I just populated a new laptop running Windows10 and installed the latest version of FireFox. When I try to watch videos from putlocker.pl I get the error message: error loading media: file could not be played. It seems that I have all of the correct plugins like ShockWave and OpenH264 but they still will not play. The used to play on my old laptop just fine in FireFox. I sort of remember having this issue before but I cannot remember what I did to fix it. All of the videos on PL seem to be file type .mp4 so they should play. I also have AdBlock and disabled it but no help. Any help is appreciated.