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Groups > comp.lang.javascript > #36975

Re: Firefox changed IFRAME behaviour - I need a remedy??

From Martin Honnen <martin.honnen@gmx.de>
Newsgroups comp.lang.javascript
Subject Re: Firefox changed IFRAME behaviour - I need a remedy??
Date 2019-07-22 16:20 +0200
Organization Liberty Development
Message-ID <qh4gnh$ig7$1@news.albasani.net> (permalink)
References <bd03eafc-e3ae-46a6-964f-f7bf8d4ccb37@googlegroups.com>

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On 20.07.2019 21:53, dr.j.r.stockton@gmail.com wrote:
> 
> With Fram being an IFRAME element of the .HTM page P that is
> running, which element has been loaded with content by
> src=SomeString, and both and the file F indicated by
> SomeString being on the same drive of a Windows PC, I have been
> using Fram.contentDocument.body to get, in P, either the DOM tree
> of F if F is a pseudo-Web page or the text of F it is a .TXT file.
> 
> That used to work (see CODE below) on most or all browsers.
> It stopped working on various browsers until, up to a few
> days ago, I could only use Firefox or MSIE for this work.
> No problem there, as Firefox is my preferred browser.  But,
> since updating Firefox to 68.0 or 68.0.1, it no longer works
> there.
> 
> /***
>       In Edge, I can read .TXT files thusly; but the main page of
>       interest declines to present its "Start" button, so there is
>       some other difference affecting my code.
> ***/
> 
> That, I presume, is because Firefox now interprets the
> same-origin policy for allowing access to IFRAME contents
> as other browsers have taken to using (I cannot comprehend
> why two files on the same local drive are not considered
> as same-origin, but there it is).

There has been a change in FF 68 following the 
https://www.mozilla.org/en-US/security/advisories/mfsa2019-21/#CVE-2019-11730, 
unfortunately https://bugzilla.mozilla.org/show_bug.cgi?id=1558299 is 
not accessible to most mortals it seems.

https://www.fxsitecompat.dev/en-CA/docs/2019/local-files-are-now-each-given-a-different-origin/ 
is info for mortals.

But you should at least see a warning or error in the developer console 
you can open with F12 if the same origin policy is indeed what prevents 
your code from accessing contents.

Mozilla seems to be aware they have broken lots of features that way but 
https://bugzilla.mozilla.org/show_bug.cgi?id=1566172 suggests they want 
to adapt them to "other browser" which will probably mean looking what 
Chromium based browsers do.

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Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-20 12:53 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? Andrew Poulos <ap_prog@hotmail.com> - 2019-07-21 15:15 +1000
  Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-22 03:07 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? Martin Honnen <martin.honnen@gmx.de> - 2019-07-22 16:20 +0200
    Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-30 08:20 -0700
  Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-30 18:24 -0700
    Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-31 04:14 -0700
      Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-07-31 05:32 -0700
        Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-07-31 18:22 +0200
          Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 02:37 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-02 13:38 +0200
              Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 05:59 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-02 17:55 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:57 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 06:11 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:44 +0200
              Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:10 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "R.Wieser" <address@not.available> - 2019-08-03 08:59 +0200
                OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 05:18 -0700
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-03 15:27 +0200
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 09:28 -0700
                Re: OT: Re: Firefox changed IFRAME behaviour - I need a remedy?? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2019-08-04 12:32 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:30 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-04 15:31 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-05 13:48 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-05 16:51 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-07 01:42 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-07 01:47 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-08 20:56 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-08 13:16 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Martin Leese <please@see.Web.for.e-mail.INVALID> - 2019-08-08 23:57 -0600
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-09 12:48 +0200
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-05 06:37 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? John G Harris <niam@jghnorth.org.uk.invalid> - 2019-08-05 18:46 +0100
                Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-06 03:39 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-05 17:30 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 15:05 -0700
      Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-07-31 18:58 -0700
        Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-02 05:01 -0700
          Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-02 16:07 -0700
            Re: Firefox changed IFRAME behaviour - I need a remedy?? dr.j.r.stockton@gmail.com - 2019-08-03 08:19 -0700
              Re: Firefox changed IFRAME behaviour - I need a remedy?? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2019-08-03 18:42 -0700
                Re: Firefox changed IFRAME behaviour - I need a remedy?? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2019-08-04 11:27 +0200

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