Strange Firefox 94 and Adblok plus and iframed content issue

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BramSchoonhoven
Posts: 1
Joined: Fri Dec 03, 2021 10:16 am

Strange Firefox 94 and Adblok plus and iframed content issue

Post by BramSchoonhoven »

Hi,

When a user has Firefox 94 (most recent version) installed in combination with Adblock plus a strange issue appears on my sites where I embed/iframe html5 games. On iframed games the left side of the game area (iframe) does not respond to clicks (as if an invisible layer is placed over a part of the iframe). Investigating it with developer tools removes the issue.

See for example where it can be reproduced: https://www.mahjong.com/game/Mahjong%20Connect%20Jungle
- Click play to play the game, and on the game screen most part of the 'hint' text is unresponsive. The whole hint text should be clickable.
- When you disable adblock plus, the issue persists even when you disable the extension.
- When you refresh the Firefox installation or do a new installation the problem is gone.
- When you play the game not in an iframe the issue is not present: https://cdn.htmlgames.com/MahjongConnectJungle/
- On all other browser/OS combinations even with adblock plus the issue is not present: it's only the combination of: Windows OS, Firefox 94 with Adblock Plus with iframed content.

Browser strings from users with issues:
- Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0
- Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:94.0) Gecko/20100101 Firefox/94.0

The issue seem to have occured somewhere around November 22. The issue occurs on different html5 games and from different publisher/developers.

Any advice?
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