(for the Twitter website on a computer - not app or mobile)
If you use your browser's search function ("find in page") to search for a word on a page on Twitter that you are looking at, it will only find words that are visible right there on your screen at the moment you are searching and finds zero results for any word that you would have to scroll up or down to see (actually, it finds results within about two or three screen-fulls above and below, but not farther). Twitter is the only site I have ever seen out of thousands that does this.
What this means is, if you are viewing the site and want to go back to a tweet that was dozens of tweets farther up (or down), you can not search for it - you have start at the top of the page and scan through all the dozens of tweets to find it! How do you get around this?
Go to any feed on Twitter and notice some word that is uncommon (any word, just not a common word such as "the").
Page-up or page-down so the word you noticed is no longer shown on your screen. Don't just do one page-up or -down; you need to do about two or three (or more).
Now do Ctrl-F like you are trying to find where on the page your word is found
You will get zero results
Now page-up or -down back to where you were, and of course your target word is right there in the tweet where you saw it.
So why is Twitter the only site that breaks Ctrl-F and how do you get around it?