Extensions help a ton. Some of my favorites:

Block or Highlight Search Engine Results - Does what the name says. When you run a search on Google or DDG or whatever engine you use, and you get a result from a shit website, add it to the filter and you'll never see that trash again. I filter out the following trash: chegg, timesmojo, coursehero, numerade, forbes, instagram, and pinterest. I've only been using this one for a little bit, so I expect that list will grow a LOT, but even with just those removed from my search results, HOLY HELL has the quality of my searches has increased. This one is probably the most relevant to OP's question.

Dictionary Anywhere - For vocab. Double-click any word on the web, and a little text bubble pops up with its definition - works on words in that bubble too, for when you run into shit like "Redundancy: the state of being redundant." -_- double click the "redundant" in the bubble to get a second bubble with a more useful definition. (doesn't happen often, but it's a cool feature, so worth calling out)

Fandom Enhance - For videogames, since every game wiki is on Fandom for some reason. This extension scrubs a LOT of the unnecessary clutter from the page.

Recipe Filter - Works with recipe websites. Scrubs out the 528 page life story from the author and reduces it down to just "Grilled cheese: bread, cheese, butter. Put butter on two pieces of bread. Put a slice of cheese in between. Put it on a griddle at 250 degrees for 2 mins. Flip it over, two more mins. Eat that sum' bitch." ✔

Youtube-shorts block. Youtube shorts NEVER have good content - get that TikTok shit outa here.

uBlock Origin - This one's a HEAVY lifter for taking the trash out of the internet. This will improve both the quality of information on screen by removing a TON of sketchy shit, and make your browsing a lot safer by filtering out malicious links. If you're not already using uBlock and take nothing else from this post, TAKE THIS ONE.

...that's pretty much it on my end, but there's a lot of other useful extensions out there. If anyone else has one to add, by all means let's keep this ball rolling!