I've been a professional C, Perl, PHP and Python developer.
I'm an ex-sysadmin from the late 20th century.
These days I do more Javascript and CSS and whatnot, and promote UX and accessibility.
There's always drilling down through tags searching innerText for a pattern. I did that on Quora to get rid of some of their junk panels before. It's expensive on an infinite-loading page, so what I was doing was adding a class (or attribute, I forget) to everything after processing so it wouldn't have to search again when the DOM got updated. I don't have that code anymore but it's relatively straightforward, just kludgey.
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There's always drilling down through tags searching innerText for a pattern. I did that on Quora to get rid of some of their junk panels before. It's expensive on an infinite-loading page, so what I was doing was adding a class (or attribute, I forget) to everything after processing so it wouldn't have to search again when the DOM got updated. I don't have that code anymore but it's relatively straightforward, just kludgey.