[kevingadd]

I had a similar problem with Owl, it's because they typically use CSS filters to achieve dark mode. It's frustrating because it's a very bad solution but it's easy to not realize that the extension is causing the problem (especially because browsers work hard to hide it)

[NeedMoreTea]

That does show up one area that Chrome still eclipses Firefox - the Shift Esc task manager that will usually reveal which tab or extension is cratering things. Firefox is much more opaque about memory and especially CPU use, making it far harder to pin down.

[feanaro]

Do you know about about:performance?

[giancarlostoro]

Firefox has a task manager now. They should improve on this to compete with Googles. Nobody wants to type a URL when they can hit an easy shortcut.

[cartlidge]

I have a hope of remembering about:performance. I can bookmark it, and it's there in autocomplete. You can make a link to it in your webpage or in a nice plugin (which, once it gets a couple thousand users, you can sell to an honest businessman for tens of thousands).

Shift-Escape? what? I'm supposed to just randomly press every key combination till something happens?

[efreak]

If you can remember the hotkey for Windows task manager, sure. It's Ctrl+Shift+ESC. If not, you can access it through the menu.

[giancarlostoro]

A shortcut is better than clicking the Hamburger menu icon, then "More" then Task Manager / typing it into the browser.

[Fnoord]

Why not both (if the shortcut is available)?