The “opposite” was just referring to those 2 aspects - Mullvad has stronger anti-fingerprinting which leads to more breakage. Librewolf has that aspect reversed. Of course, both browsers are similar overall. That’s just one detail where they prioritize differently.
Not generally, however you might want to avoid any early dot-zero releases (e.g. 6.0.x). These tend to be a bit buggy with KDE Plasma, but the bugs get fixed soon. NVidia drivers should be better with the very latest updates, they are supposed to work well on Wayland now. But I don’t buy Nvidia, just AMD, so I’m not following this stuff closely.
Both are good. Librewolf is more like vanilla Firefox, just configured way better by default. Mullvad Browser is like a port of the Tor Browser (also based on Firefox) for the clear web (or for use with Mullvad’s VPN, or whatever). Also configured very well by default. Mullvad Browser has better anti fingerprinting stuff built-in but as a result of its unusual configuration some sites might be broken. Librewolf is kind of the opposite - sites won’t be broken but you’ll be easier to fingerprint. In any case, they both are at the top of the best Firefox variants I’d say.
https://piped.video/watch?v=KW6E51xXcWc for Valve’s contributions, by a KDE dev. According to a 2022 interview they pay over 100 open source developers working full-time on various important open source projects, from Mesa to Vulkan to AMD GPU drivers to KDE Plasma to gamescope to Wine to DXVK and VKD3D to you name it. The whole desktop ecosystem is benefitting from this, not just the Steam Deck, and not just gaming.
I get that proprietary software and DRM is a general problem, and Steam is part of that problem, but completely getting rid of that is simply a battle for another time, further in the future. The first battle is to get Windows users abandon their Microsoft/Apple cages, and that’s a win that’s actually within reach now. Windows also becomes worse by itself, further accelerating the change. That’s important, because running a proprietary OS is still much worse than running some proprietary applications or games on a free OS. A closed OS completely shifts control away from the user, leaving only what the developer allows you to do, and it allows the dev to always push his or her agenda by favoring applications from the same developer, and allowing the developer to establish proprietary APIs and libraries like DirectX which was problematic for the competition for quite some time. Establishing Linux as a neutral, user-controlled, non-proprietary, much more trustworthy OS is the first step away from that. And to reach that, users will have to be able to run at least some of their usual applications or games on Linux as well. Otherwise they simply wouldn’t switch in the first place. For a regular user, using Linux cannot feel like being a downgrade. A regular user does not understand the ethics behind closed and open source and will never choose a worse free option over a better proprietary one. That either means the free options must become true rivals, or - which is the easier goal for now - the proprietary apps have to run on Linux just as well as people are used to.
A “war” isn’t being won all at once instantly, but by winning several smaller battles after one another. Which takes time.
OP is somewhat correct, but still “short-sighted” with a misleading conclusion. All these valid downsides should be mentioned, but as always there are pros and cons to everything, and in Valve’s case, the pros still outweigh the cons, and you always have to weigh pros and cons against each other.
Valve has done a lot in the last ~10 years to push desktop Linux for mainstream gaming viability and several other features as well (open source shader compiler, Direct3D-to-Vulkan translation stuff, HDR support in KDE Plasma, lots of improvements for the open source AMD GPU drivers, and much more stuff). You can’t simply disregard that. Sure, there are lots of companies involved in improving Linux - but it’s mostly for the server side or the enterprise desktop segment. Almost no big company invests meaningful amount of resources into improving the common Linux desktop significantly and challenging Windows’ dominance for home entertainment/gaming, read: the casual home user. Valve did just that, of course also mostly for their own reasons, but their own reasons still do benefit general desktop Linux massively, and they are almost alone in doing so. And I probably don’t have to mention that having a rich company investing lots of money into pushing stuff does really help development speed. The development pace of the Linux kernel for example is only so high because many big corps spend developers and resources on it to improve it for their own data center use cases. Almost no one (again, except Valve) pours any significant amount of resources/devs into the desktop Linux ecosystem and drivers so far.
Look at GOG - in theory a shining example of how to do several things better than Valve (no DRM, etc.), but they still do close to nothing for desktop Linux, probably because they lack the resources or see it as a wasted effort overall. Like many companies do – the typical chicken-egg-problem. Linux won’t be better supported by companies until its market share grows, but its market share won’t grow until it is better supported by companies. The GOG Galaxy client probably still has no Linux version. That’s just how things have been for a long time and I’m glad to have Valve really be serious about it and demonstrate it publicly that this can work and that this is an example for other companies to also look at it. Their exact reasons or methods don’t even matter - we need companies pushing desktop Linux, or otherwise you can still sit in a corner and cry about Windows’ dominance in 2050 still because nothing really changes on a fundamental level fast enough. Which is why I see it as important to be favorable to Valve for doing this when no one else is doing it. If you want things to change, then do support changes that meaningfully contribute to Windows losing exclusive market share in certain areas like gaming, and tons of people will migrate away from Windows over time because they will start seeing Linux as a viable, practical alternative, not just a theoretical thing. Sure, always be mindful of any disadvantages. But please don’t act as if there weren’t any major advantages as well.
Be glad for how things are developing currently. It could always be better, sure. But it could also be massively worse. And it has been massively worse for a long time. It’s high time to change, and desktop Linux needs all the help it can get to become mainstream. It’s on its way there, thankfully, but that way hasn’t been so clear all the time. Desktop Linux share has always been sub-1% for many, many years. Only very recently it made significant strides forward.
The question is wrong: it’s not why do you “still” hate Windows. I did like Windows 7. It was the last Windows I liked. After that, it’s just a downhill enshittification spiral. The only real question is: at which point will it be too oppressive for the common user that even the most common user will try to avoid it entirely. And I fear that there’s still more than enough room for MS to make Windows worse before enough people migrate away from it.