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  1. #1
    Member
    Join Date
    Jan 2012
    Location
    SalÚ
    Posts
    5

    Problem with Firefox update n. 48.0

    Hi,
    since yesterday's Firefox update to version 48.0 my client libraries (JS) stopped working.

    The error we get back is:
    Error: Permission denied to access property "LS_e"

    Client library version: 5.0 (JavaScript)

    I found out from the forum that the problem could be caused by domain / host setup, but I think we have the correct setup:
    domain: *****.org
    LS_Host: push.*****.org

    Can the problem be caused by a bug in Firefox update?
    Any ideas?

    Thank you
    Last edited by enrico; August 5th, 2016 at 10:58 AM. Reason: added library type

  2. #2
    Administrator
    Join Date
    Feb 2012
    Location
    Milano
    Posts
    543
    Hi enrico,

    I confirm that we are investigating the issue directly in touch via support.

    Regards,
    Giuseppe

  3. #3
    Administrator
    Join Date
    Feb 2012
    Location
    Milano
    Posts
    543
    I can confirm that the issue is due to an unusual behavior introduced by Firefox 48.0 that concerns document.domain set on iframe/parent when coming from different ports.
    The behavior is also explained here: https://bugzilla.mozilla.org/show_bug.cgi?id=1292522 .
    In case of Lightstreamer client lib 5 (or lower) the only workaround viable is to uniform the port number between web and lighstreamer servers.

    I also confirm that JavaScript library 6 or newer is not affected by the problem since totally different techniques are used.

 

 

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