Description of problem: For some Amazon web pages, epiphany hangs, with WebKitWebProces using 99% cpu. Version-Release number of selected component (if applicable): epiphany-runtime-3.26.5.1-1.fc27.x86_64 webkitgtk4-2.18.6-1.fc27.x86_64 How reproducible: very, but not 100% Steps to Reproduce: 1. In epiphany, open https://www.amazon.com/Ingathering-Complete-People-Stories-Henderson/dp/0915368587/ref=sr_1_cc_1?s=aps&ie=UTF8&qid=1520257317&sr=1-1-catcorr&keywords=ingathering Actual results: epiphany hangs. "top" command shows 99% cpu for WebKitWebProces Expected results: Web page loads OK. Additional info: Since the Amazon web pages are dynamic, with changing advertisements and recommendations, tracking down the problem may be challenging. Quitting epiphany takes about 20 seconds. In ~/.config/epiphany, deleting session_state.xml and renaming session_state.xml~ gives an error display and allows you to continue using ephiphany, which otherwise keeps trying to load the bad web page when epiphany is restarted. Another page which causes the same problem is: https://www.amazon.com/Dragons-Egg-Dragon-Eggs-Book-ebook/dp/B01JOL7BKC/ref=sr_1_1?s=digital-text&ie=UTF8&qid=1520258748&sr=1-1&keywords=dragon%27s+egg+Sorensen
Does it work if you run with the environment variable WEBKIT_DISABLE_COMPOSITING_MODE=1?
(In reply to Michael Catanzaro from comment #1) > Does it work if you run with the environment variable > WEBKIT_DISABLE_COMPOSITING_MODE=1? No. Same result.
OK, so it's not a GPU problem... strange that I can't reproduce. I tried disabling the adblocker too; still can't reproduce. Next step is to move this to the upstream bugtracker. Here's my canned reply for that: This issue is most likely a bug in WebKit. Please report the bug to https://bugs.webkit.org/ including a link to this bug report and noting the version of WebKitGTK+ that you have installed. When reporting the WebKit bug, be sure to include the prefix '[GTK]' in the bug summary and select the 'WebKit Gtk' component.
I have the epiphany addblocker disabled. Unfortunately, the Amazon web page will display some previous browsing selections and some recommendations, which will depend on my unique Amazon browsing history, so that this problem may be difficult or impossible to replicate.
If I turn ad blocking on, then both URL's load OK. Plugins are enabled, but I haven't explicitly installed any. On the second URL, which had successfully loaded, I turned ad blocking off, and reloaded the page, and it hung again. So, it would appear that the problem is caused by some Amazon ads, but not other ads.
This will be a nightmare to track down, since the ads will be based on your location and browsing habits... still, I've heard of ads freezing WebKit before, so it's not just a problem for you. I don't think we have a bug report for it yet, though. Best option, if you care to create another Bugzilla account, is to report it upstream: (In reply to Michael Catanzaro from comment #3) > This issue is most likely a bug in WebKit. Please report the bug to > https://bugs.webkit.org/ including a link to this bug report and noting the > version of WebKitGTK+ that you have installed. When reporting the WebKit > bug, be sure to include the prefix '[GTK]' in the bug summary and select the > 'WebKit Gtk' component.
OK, thanks for reporting upstream! It's more likely to be fixed there.