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Re: JS injection in Firefox

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On 2012-06-14 03:54, Shelly wrote:
> On 6/13/2012 5:16 PM, Stefan Weiss wrote:
>> Or you could show us the code that worked in Firefox in 2008. Maybe
>> there's something else going on.
...
> I can't show the code (company policy).  I wrote this app starting in 
> Jan 2008.  Nothing at all has changed in the code.  I used Firefox to 
> develop it because of its Firebug tool.  The browser problems I had at 
> that time was making all the features work properly in IE.  For example, 
> I put up a popup box that stays fixed in position on the screen even 
> when scrolling the window behind the pop-up.  That was a devil to get 
> working properly in IR.
> 
> Now the company wants to use this again (they hadn't for a a few years). 
>   So, I went to see if it still worked.  It does in IE, but not in 
> Firefox.  Again, nothing has changed in the interim.
> 
> Here is what is returned from the server:
[...]

Since you were using Firebug when you wrote the code back then, I'm
going to assume you know how to detect JS errors and warnings.

The code you posted doesn't really help; it's just JSON with an
"innerHTML" key containing a script. I suppose something could have gone
wrong with the DHTMLSuite scripts, but I don't know that library. It
would have been more interesting to see how the script gets added to the
document.

There's really not much I can do at this point. A script that worked in
2008 but fails now, without errors or warnings... The only thing that
comes to mind is that quirks mode was much more prevalent then, but
that's more likely to produce rendering errors than nothing at all.

You could try to replace the script contents (in the JSON response) with
something simple like "alert(1)", and see if that gets evaluated. Other
than that, check if there's a new version of this DHTMLSuite thingie,
maybe that helps. According to the dhtmlgoodies site, the current
version was "Last updated: July. 10th. 2009: Bugfix for Firefox 3.5.".

- stefan

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Thread

JS injection in Firefox Shelly <sheldonlg@thevillages.net> - 2012-06-13 13:31 -0400
  Re: JS injection in Firefox "Tom de Neef" <tdeneef@qolor.nl> - 2012-06-13 20:47 +0200
    Re: JS injection in Firefox Shelly <sheldonlg@thevillages.net> - 2012-06-13 15:32 -0400
      Re: JS injection in Firefox "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2012-06-13 20:02 +0000
        Re: JS injection in Firefox Stefan Weiss <krewecherl@gmail.com> - 2012-06-13 23:16 +0200
          Re: JS injection in Firefox Shelly <sheldonlg@thevillages.net> - 2012-06-13 21:54 -0400
            Re: JS injection in Firefox Stefan Weiss <krewecherl@gmail.com> - 2012-06-14 05:28 +0200
              Re: JS injection in Firefox Shelly <sheldonlg@thevillages.net> - 2012-06-14 08:17 -0400
    Re: JS injection in Firefox Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2012-06-15 00:55 +0200

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