Memex 🧠 is an interesting web browser add-on that is designed specifically for powerusers
no it's not a meme generator
It is a Vannevar Bush inspired bookmarking/local search engine of sorts
find webpages that you visited in the past
The extension is available for Firefox and Chrome
It is also open source, and has a good privacy policy
Memex should add a sidebar and it should be visible when you mouse over to the right edge of the screen
There is one important feature which is present in the sidebar which is not in the menu: Notes.
Memex allows you to annotate on any web page.
To do so, click the notes icon and type something.
For e.g. If you're an Amazon page, you could type something like "This could be an interesting gift for Max's birthday."
So, you'll remember why you saved the page and why.