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The oddity when the adblocker is enabled

  • I noticed one oddity when the adblocker is enabled. Many :root definitions appear in the <styles> section of loaded files.
    Tested on two computers. Who knows what this is?
    System is Win7 64, Opera 49.0.2725.64
    I can`t attach exsample files, but i wrote example of added text..

    `<br><style type="text/css">:root a[href^=""], :root .GKJYXHBF2 > .GKJYXHBE2 > .GKJYXHBH5, :root a[href^=""], :root #\5f _mom_ad_2, :root #rhs_block .mod > .luhb-div > div[data-async-type="updateHotelBookingModule"], :root a[href*=""], :root #\5f _admvnlb_modal_container, :root #MAIN.ShowTopic > .ad, :root a[href^=""], :root .GB3L-QEDGY .GB3L-QEDF- > .GB3L-QEDE-, :root #main_col >

    and so on</td>`