Changes between Initial Version and Version 1 of Ticket #1953, comment 2


Ignore:
Timestamp:
02/05/2015 03:47:54 PM (5 years ago)
Author:
trev
Comment:

Legend:

Unmodified
Added
Removed
Modified
  • Ticket #1953, comment 2

    initial v1  
    44 
    55The culprit in this particular case is speculative parsing, a feature available starting with Firefox 3.5. [https://stackoverflow.com/a/1072813/785541 Here] are some details on it, but the essence is this: while Firefox is stuck processing a script, it will already try to download these images - just in case (that's the speculative parsing). These downloads are blocked by Adblock Plus and counted as hits. Then the script processing finishes and the browser gets to these images by regular means. Given that they haven't been downloaded before, it tries to download them again - and we block them again. As far as Adblock Plus is concerned, these are two separate download actions and each of them has to be counted. 
     6 
     7Note that originally I was unable to reproduce the issue, simply because I had the scripts in question blocked.