1519448 - Can't scroll back to top of Business Town Tumblr

Status: RESOLVED DUPLICATE of bug 1628176

(Core :: Privacy: Anti-Tracking, defect, P3)

Description

[Andrew Overholt [:overholt]]

STR:

1. go to http://welcometobusinesstown.tumblr.com/
2. scroll down a bit
3. try to scroll back to top

Expected:

• can see the initially-at-the-top content (in my case ATM "The Marketing Loft" and the CEOs)

Actual:

• can't scroll up beyond a certain point

Video that illustrates the problem (I was just scrolling with my trackpad): https://www.dropbox.com/s/a75mz8ybdue4h29/BusinessTown%20-%20Firefox%20Nightly%202019-01-11%2011_42_16%20AM.mp4?dl=0

Nightly, Windows 10

Comment 1

[Ted Campbell [:tcampbell]]

Looking at console, this is related to Content Blocking. In a fresh profile, the site is fine until I use Private Browsing which enables Content Blocking again.

Comment 2

[Andrew Overholt [:overholt]]

Oops, I should have checked :)

Comment 3

[Thomas Wisniewski [:twisniewski]]

I see that they appear to be expecting Twitter APIs to be loaded, or there are script errors:

TypeError: can't access property "load", window.twttr.widgets is undefined fixie-app.js:1:2750
    <anonymous> https://static.tumblr.com/e6lc7yi/WBOneh29v/fixie-app.js:1
    callback https://static.tumblr.com/e6lc7yi/ewpneh29l/fixie-plugins.js:1

Sure enough, whitelisting https://platform.twitter.com/widgets.js seems to prevent those two panels from vanishing (the marketing loft one and the one to the left of it).

I can also spoof the Twitter script so that it defines window.twttr.widgets = {} and that seems to be enough as well, so we should be able to shim away this breakage.

Comment 4

[Takanori MATSUURA]

If embedded Twitter contents require cookies from twitter.com (third party cookie) to embed contents, this is the right behavior.