Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Receive error: "A script in this movie is causing Adobe Flash Player to run slowly..." Firefox problem? Adobe problem? Malware?

  • 4 replies
  • 25 have this problem
  • 13 views
  • Last reply by Bob Stein

more options

While browsing a variety of site, while running no movies at all, I receive the following message:"A script in this movie is causing Adobe Flash Player to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?" I click "ok", error message disappears. minutes later, error message re-appears.

I've removed Adobe Flash, cleaned registry, rebooted, all to no avail.

While browsing a variety of site, while running no movies at all, I receive the following message:"A script in this movie is causing Adobe Flash Player to run slowly. If it continues to run, your computer may become unresponsive. Do you want to abort the script?" I click "ok", error message disappears. minutes later, error message re-appears. I've removed Adobe Flash, cleaned registry, rebooted, all to no avail.

All Replies (4)

more options

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window or otherwise make changes.

You can check for problems with current Flash plugin versions and try these:

  • disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
  • disable protected mode in Flash 11.3 and later
  • disable hardware acceleration in the Flash plugin
more options

Thanks, cor-el - I'm working my way through your suggestions. I guess I'm trying to figure out why this error just started recently; no new extensions, no RealPlayer installed... That's why I was thinking Trojan, etc.

Thanks again

more options

I have been having this problem as well ! GRR I looked online and it suggested to download "shock wave for director 12.0.2.122" and also to reset Firefox... I did both of these suggestions and nothing !! Every time I go to use my laptop it crashes :-(( So if anyone can help I am all ears. This may work for some people it seemed to help others online on the forum I was on. Unfortunately for me it did not. I even performed a disk clean up and ran my CC cleaner and my AVG and the problem is still persisting. So I do not think it is a bug. I believe this started after I updated my Adobe.

more options

Running dslreports.com Speed Test in Flash. Hit Cancel for the tenth time and counting. In search of a way to increase this timeout. Suspect my test is toast. This dialog box ("A script in this movie...") keeps coming up even after `Download test complete`.