I'm the person who reported that. As a temporary workaround I'm using the Favicon Switcher extension (with a smaller file). You have to do it per Firefox instance; the settings aren't synced.
It's not a nasty habit at all. This is a perfectly reasonable way of constructing complex instructions: by starting with something simple and gradually adding complexity. I've been programming in various languages for decades, and I still do this all the time, when constructing bash pipelines, regular expressions, etc.. When I'm coding in Python, I have an interpreter open so that I can test out simplified snippets of whatever I'm adding to my larger program.
You're way ahead of people who write 5000 lines of code with zero testing of any kind, and then try to run it and discover that what they have is an impenetrable blob of syntax errors and misunderstandings. Or people who confidently create a cron job with a complex pipeline that they haven't tested incrementally, and discover a year later that one of the steps is subtly wrong.
Programming is a discipline in which prototyping is cheap. You can test partial solutions at a very low cost in time and effort (unless the individual commands are resource-intensive, in which case you should still try to set up some kind of simplified test with reduced resource usage). So there's really no reason not to do this, even with idioms that you're 99% sure you're remembering correctly.
I've found the playlist -- it's called Alone Together. I've just started on the first episode and it's pretty cool. It's a fanfiction radio play!
The lemmy.world favicon is not being displayed in Firefox (but works in Chrome/ium). I'm pretty sure that this is because the currently used image is too large (it's 4267x4267 pixels and 365K, far larger than is needed for a favicon). Another instance encountered the same issue, and their favicon works now (after being reduced in size).
My very first WM was Blackbox, back in 2000, and I imprinted on it like a baby duck, so today I still mostly use Fluxbox. It's abandoned and unmaintained, but still works (for now). It's very minimalist and lightweight. When it finally dies completely I guess I'll finally learn how to use a tiling WM.
(I use Gnome on a laptop with a HiDPI screen, because that was too annoying to configure correctly on Fluxbox. It's... fine. I added a bunch of customisations and it mostly stays out of my way, which is what I want in an environment.)
No matter what WM/DE I use, I always add a dropdown / "quakelike" terminal application -- I previously used Yakuake, but switched to Guake. It uses a hotkey to show / hide a terminal (and you can use multiple tabs, and multiplexers inside the tabs). I can't live without this, and I highly recommend it if you often find yourself hunting around for your terminal window.
This happens to me all the time. It's a known issue which has been reported multiple times; #1375 appears to be the primary issue for this in the UI repo.