Website hogs system resources

Framework Laptop 13 Linux
1

Hi all,
I have recently been browsing the Framework Marketplace, and noticed that the site makes Firefox use 50% of every CPU core, and an unnatural amount of memory. Even when not interacting with the site, just having it open in a tab. I haven’t noticed this with any other website except very intensive ones (like 2k video playback), which points to the Framework store having some optimization quirks.
Has anyone else noticed anything similar? Or could it be my specific combination of site, browser version, OS and hardware?

System info:
Framework Laptop 13, AMD 7640U, 2x8GB DDR5-5600
Charger unplugged, Energy Efficient power profile
1x USB-C exp.card, 2x USB-A, 1x HDMI. External monitor connected to HDMI, keyboard connected to one USB-A, Bluetooth mouse.
Manjaro Linux with KDE (Plasma 6.2.4, KDE frameworks 6.8.0, Qt 6.8.1, Kernel 6.11.10, X11) updated just before Christmas 2024, Firefox 133.0.3

2

The Marketplace page definitely uses more resources (lots of JS code running for the various moving parts, cart, etc) than, say, this community thread, but the difference shouldn’t be 50-fold.

I’m on Chromium (not Chrome) on Ubuntu 22.04 on the FW 16 AMD R7 7840 with 32GiB RAM, but this shouldn’t make a massive difference.

This tab at idle: 84MB RAM - 1% CPU
Marketplace tab at idle: 78MB RAM - 10% CPU

I can get usage to spike upwards of 50% if a rapidly scroll a list of products, as contents are being dynamically loaded due to the number of items on the page.

I do have a thought, though…are you using hardware acceleration (GPU rendering) in Firefox? If not, all of the graphics processing of the Marketplace pages will be rendering on the CPU, which will definitely jump usage. When I scroll, I see my 780m iGPU spike to over 50% usage because I have the iGPU doing my rendering, which keeps CPU loads lower.