I use Windows 7 and Firefox 17.0.1. For the past week or so, on most web
pages I visit, I get a pop-up box that says âJavaScript applicationâ in the top
left and then error âsyntax errorâ in the middle of the box. Iâve searched for
answers but have found none that have helped. Can you tell me how I can stop
this annoying error message?
In this excerpt from
Answercast #95 I look at some odd javascript errors, possible causes and
solutions.
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Javascript syntax errors
Well, yes and no. I can only guess where that is coming from because itâs unlikely that all of these different sites are actually using JavaScript â and all have a JavaScript error, an actual error, in what theyâve encoded on their web pages.
Whatâs more likely is that thereâs something on your machine that is causing that.
Possible virus
Now there are two scenarios that come to mind. One is you have malware on your machine â or perhaps more correctly, you have an attempt at malware on your machine â that has left some kind of trace of malware in a way that is impacting your browser.
Maybe itâs trying to hijack your browser, and is failing, or doing something else that has somehow caused a problem with your browser.
Browser add-on failure
Now, it could be an add-on. I would certainly start by disabling all of the add-ons.
More likely, though, is that this is malware. Itâs a bad install of that malware. Yes, malware is not perfect. It can in fact fail and fail in some very interesting and confusing ways.
Anti-virus scans
The very first thing I would do is to run a complete and fully up to date anti-malware scan â both anti-virus and anti-spyware if you have two separate tools
I would probably also grab a copy of the free tool from malwarebytes.org and run a complete scan with that as well.
Corrupt browser
The other thing that comes to mind is that something in the browser itself is corrupt. It broke for reasons unknown.
What I would do in that case (if the malware scan doesnât resolve the issue for you) is I would reinstall the browser. I would uninstall the browser completely first and then reinstall that browser.
Alternately you could switch to a different browser.
Software conflicts
While I was thinking this through a third option came to mind. That is that the anti-malware tools themselves could be impacting the browser.
Many anti-malware tools will attempt to scan any pages youâre viewing as youâre viewing them; as they get downloaded. That can interfere, at times, with the browserâs access of those files; access of whatâs in those pages.
Itâs a complex timing interaction. It doesnât happen for everyone and it doesnât happen all the time.
The thing to look for there is to go to your anti-malware tools and make sure that anything that might be considered âreal time scanningâ of browser pages, of your internet browsing, is actually turned off.
You can temporarily turn off your anti-malware tools completely â but only do that temporarily just to see if the problem goes away. Turn them back when youâre done.
What youâre really looking for is an option that controls whether or not your anti-malware tools are looking at your web browserâs pages as they are being downloaded. That can sometimes interfere with the browser in such a way that weird things like this can happen.
(Transcript lightly edited for readability.)
Next from Answercast 95- Why donât my speakers work?
If Oracle canât repair Java language with updates
why isnt Java banned ?
I use Apache Open Office and often receive an ASCII error message when I try to open a file. If I click to open the file, all I get is gibberish. Whatâs going on? And how can I prevent it? Should I be saving these files in a different way? Thanks for your response.
Iâve had this happen. What I did was uninstall and reinstall whatever I thought was causing the problem. Browsers, anti-malware, and anything else that I thought might be involved. The un-re-install worked for me but âyour milage may varyâ.