FF and Unresponsive script

[#1]

Often on my PC I get unresponsive script errors (see capture) but everything usually returns to normal after clicking Stop Script.
Today I kept getting this error on my laptop when trying to login to First:Utility.
In the end I used Task Manager to quit FF and any Java apps running, then on reopening FF I quickly closed the First:Direct tab.
I had no problem with Chrome.
Any ideas what is really the issue and how to prevent it in future?

[#2]

Is you Java up to date ?

[#3]

Quote from: Mav

...I had no problem with Chrome. Any ideas what is really the issue and how to prevent it in future?

Lead me not into temptation.

[#4]

@TORPC. Laptop was on V7 build 65 so I am just downloading build 67.
PC is out of action for a few days as the new power supply failed. But that is still on V6 but can't remember which build as the later builds tend not to work too well with JDownloader.

Quote from: ReedRichards

Lead me not into temptation.

Don't tell me, you know the way

[#5]

Java and JavaScript are not the same thing.
JavaScript is handled entirely by your web browser itself, you don't need Java installed for Firefox or Chrome to handle JavaScript. Any problems with JavaScript are likely to be due to Firefox add-ons causing problems.
Quitting any Java applications that were running on your computer, independent from Firefox, will not have any impact on what JavaScript Firefox is or isn't running.

[#6]

Thanks, ejs.
That does explain why quitting Java had no effect

[#7]

Surprise. surprise.... Google is your friend... ( so long as you dont get "unresponsive script" warning 
https://support.mozilla.org/en-US/kb/warning-unresponsive-script
Not sure I would want to go that route... but.....

[#8]

ll was ok after updating to the latest version until I tried to login to First:Utility again where the same thing happened.
Never used to happen on the PC but maybe something has changed in their site. Should be getting the PC back later today so will test that later.

[#9]

For a few days now... I have had the same problem...but not had it today... YET ! ...

[#10]

Witnessed the same problem today on a client's computer.  Obviously just a buggy version of Firefox so either wait for the next one or switch to something that works (like Chrome). 

[#11]

There are many things about FF I like but the memory leaks and Javascript issues is making me think again. Maybe I'll revert back to IE

[#12]

Or you could always switch to Pale Moon. All the flexibility of FF with addons/plugins as you prefer, but without the crap and destruction that the FF team have turned FF into.

[#13]

WARNING.... there may be a "dodgy" .exe file on that linky.....
I clicked on the download box, gave me a .exe file to save.... when trying to execute it... my laptop "froze"... the mouse cursor moved but the buttons did not function.... had to shut down with the power button..... restart "windows normally"... still the mouse buttons did not work... removed the mouse and inserted it again... managed to "restart" ( re-boot ).. and now seems to be working ok...

[#14]

I seriously doubt it, though of course it's always possible any exe from any site could be interfered with. You can always submit downloaded files to https://www.virustotal.com/uk/ for scanning by multiple engines. I've never had a single file (including every Pale Moon version d/l) with anything wrong with it.

[#15]

I get this problem every day on ebay.co.uk... buy it, love it, sell it