RESOLVED DUPLICATE of bug 271700 273343
iframes reloaded repeatedly on developer.mozilla.org pages 
https://bugs.webkit.org/show_bug.cgi?id=273343
Summary iframes reloaded repeatedly on developer.mozilla.org pages
Jeff Johnson
Reported 2024-04-26 15:22:52 PDT
Created attachment 471171 [details] Screen recording with web inspector I can reproduce this issue with Safari 17.4.1 and Safari Technology Preview 193 on macOS Sonoma and Ventura and iPadOS 17.4.1. I haven't tested any other Safari configurations. I can't be certain that this is a WebKit bug rather than a Mozilla bug, but it only happens in Safari, not in Chrome or Firefox. Steps to reproduce: 1) Open https://developer.mozilla.org/en-US/docs/Web/HTML/Element/figure 2) Scroll down the page Attached are screen recordings demonstrating the issue. In one screen recording, the web inspector is open to the Network tab, and you can see the runner.html iframe getting reloaded repeatedly. Also, this is causing high CPU usage in the Safari Web Content process, around 50%.
Attachments
Screen recording with web inspector (21.97 MB, video/quicktime)
2024-04-26 15:22 PDT, Jeff Johnson 		no flags
Details
Screen recording (13.99 MB, video/quicktime)
2024-04-26 15:23 PDT, Jeff Johnson 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Jeff Johnson
Comment 1 2024-04-26 15:23:27 PDT
Created attachment 471172 [details] Screen recording
Jeff Johnson
Comment 2 2024-04-26 15:24:07 PDT
I've seen this issue occur before on other developer.mozilla.org web pages (I don't remember which ones). I finally decided to investigate today.
Ahmad Saleem
Comment 3 2024-04-27 06:09:48 PDT
Yes - we have almost four or five similar iframe reloading issue. Thanks for flagging.
Simon Fraser (smfr)
Comment 4 2024-04-27 08:54:46 PDT
*** This bug has been marked as a duplicate of bug 271700 ***
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