Of course they can be disabled. But sites are not all built the same way, so there isn't one silver bullet we can tell you about to disable them everywhere. On mobile it's even more difficult because access to browser plugins is more limited, along with developer features within the browser.
I also use FF on Android, and until recently was also using Reddit. There isn't a good way to remove that bar.
People sure like to dunk on PHP. I'll take whatever flak for this, but this is the kind of meme a .NET fanboy or Ruby on Rails bro would make when they haven't touched any languages other then their prescious, and don't know wtf they're talking about.
PHP, after all these years, is STILL running 78% of all sites. That's not because it's garbage or the worst. It's solid, reliable, mature and very well documented. And I say this as someone who has gladly moved to Python, but also work in in others.
In case it hasn't been mentioned, you can exclude reddit from your searches with the flag "-reddit.com". So, searching for...
memes -reddit.com
will show you all results without results from reddit. :)
I'm 48. I was dating five years ago, and now I'm married to a woman who doesn't play games at all. So I'll say this: when a date says "oh dear" or some such when you say you play games, that's a red flag. Even if they don't personally play, it's pretty shitty for a partner (or potential partner) to try to make you feel bad about about your hobbies. Absolutely fuck that noise. They don't have to like the same things, but it's a whole other situation for them to tell you it's dumb or wrong for you to like what you like. That goes double when you have kids and you play with them.
I play games, I draw, and I play D&D. Hell, I just bought a Steamdeck and am goingto build an arcade cabinet with my stepson. My wife does none of that, and it's super important to me that I not be shamed about my hobbies. I would never shame her about hers.
There is no age cutoff. The idea that fun things are childish is a stupid concept pushed by boring people on the rest of us because they don't know how to have fun anymore.