From 8ca3176ab13e011b0b3243b58644c208b33955d2 Mon Sep 17 00:00:00 2001 From: Thorin-Oakenpants Date: Wed, 26 Apr 2017 18:02:33 +1200 Subject: [PATCH] 2426 dom.IntersectionObserver.enabled added default is false anyway. We can readdress this if it ever gets turned on, or used for purposes other than ad networks - I suspect there's nothing really out there using it right now, and the fact 53 is false, I bet there's no big hurry to turn it on due to stability and real world usage. --- user.js | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/user.js b/user.js index b1cce97..776391c 100644 --- a/user.js +++ b/user.js @@ -1024,6 +1024,14 @@ user_pref("javascript.options.wasm", false); /* 2425: disable ArchiveAPI i.e reading content of archives, such as zip files, directly * in the browser, through DOM file objects. Default is false. ***/ user_pref("dom.archivereader.enabled", false); +/* 2426: disable Intersection Observer API (FF53+) + * Almost a year to complete, three versions late to stable (as default false), + * number #1 cause of crashes in nightly numerous times, and is (primarily) an + * ad network API for "ad viewability checks" down to a pixel level + * [1] https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API + * [2] https://wicg.github.io/IntersectionObserver/ + * [3] https://bugzilla.mozilla.org/show_bug.cgi?id=1243846 ***/ +user_pref("dom.IntersectionObserver.enabled", false); /* 2450a: force Firefox to tell you if a website asks to store data for offline use * [1] https://support.mozilla.org/en-US/questions/1098540 * [2] https://bugzilla.mozilla.org/show_bug.cgi?id=959985 ***/