”Webpage is slowing down your browser” This is the new way the browser tells you there is a problem with the script program(s). https://support.mozilla.org/en-US/kb/warning-unresponsive-script?cache=no

airpoll said

The browser displays a yellow bar at the top of the page stating "A web page is slowing down your browser, what do you want to do, wait or stop?" This only happens when trying to view videos on mlb.com - I do not see this on any other site. It started about three days ago; never saw this previously and I've been on mlb.com many times for a few years. I'm running FF 62.0, 64 bit on a Windows 7 pc. I have cleared cache, run in safe mood, disabled Malwarebytes and my anti-virus but it has not resulted in any change. It also appears on IE 11. I don't see the yellow bar in Chrome but the videos hand up as well. This is an mlb.com problem since I see this with other browses and solely on the mlb site. FF is my preference and mlb's technical support is useless, so my reach out to FF to see if a solution has been found - or learn how to knock on mlb's door. thank you

I have the exact same problem with mlb.com videos. There was a different problem with MLB.com videos in 2017 and it forced me to use Chrome to view them but in 2018 Firefox had fixed it until earlier this week. The proposed solution of JavaScript toggle on/off extension simply shuts down all video on MLB.com so is not a solution in any way.

Thank you FredMcD but your suggestions did not solve the problem. I had the same experience as reported by Greg_Beau with the JavaScript toggle -video gets shut down when the toggle is enabled so it is not a solution.

I do run Webroot and Malwarebytes so I shut down both; I also ran, again, FF in safe mode but the same problem continues. I recalled that I had re-installed a Philips webcam last week, which runs in the background with no obvious way of disabling it - so I uninstalled it and the driver; ran CCleaner but the problem continues. This has to be an mlb.com issue as I've had similar experiences as Greg_Beau with that site. I have sent mlb support a couple of notes but the responses I get, when I receive one, are clearly automated as it provides unrelated solutions - my Alexa does a better job responding to queries.

There code is terrible. They are not interested in providing good help just as long as you keep clicking.

Run there pages and send them the URL's and ask them why .

W3C.org (World Wide Web Consortium) in charge of standards and practices and future development of web pages and web browsers make the rules on code. Mozilla Firefox follows these rules. HTML https://validator.w3.org/ CSS https://jigsaw.w3.org/css-validator/

Thank you, Pkshadow. Within the hour, I heard back from mlb.com technical support, and I provided them with detailed information. I'll see what happens.

Good for you. I hope you and all others with issues at the site get positive results. Embarrassment might make a nice escalation if have to move that far.

The solution is to disable ad-blocking software. Although earlier in the week, I had disabled ad-blocking, ran FF in safe mode, etc., the videos on mlb.com would not run.

They must have been fiddling with their site for a few days and in the process, making it unwatchable until they figured out how to not allow the videos to be seen on browsers with ad-blocking extensions/add-ons

Just fiddling around myself earlier today, I disabled my ad-blocking extension and, what do you know, the videos ran. I use uBlock Origin on one PC and adBlock on another and on both machines, the ad-blockers had to be disabled in order to see the video.

I have disabled my ad-blockers on a few sites because I understand the revenue part of this; however, mlb.com's ads run after nearly every video. Most videos are between 30 and 60 seconds. To have to see an ad that runs for 15 seconds between videos that run for 30 seconds is very annoying. If anyone finds an ad-blocker that also works on mlb.com, please post it.