Write what comes to mind in a side panel next to what you're reading. The page URL is saved with every note.

Short to write, short to find again
Press Alt+S (Mac: Option+S) and the panel opens beside the page you're reading. No tab switching, no second app.
Tag a note with a category and the list will show you that group alone.
Notes live in your account. Write one on your work PC and open it on your laptop at home.
Find a note by a single word, even once hundreds have piled up. You don't have to remember which page it came from.
After installing, this is all there is
Alt+S (Mac: Option+S). The page you're reading stays put
Type it out — it saves without a save button
See everything you've written at webmemo.xyz
Other ways people use the same tool
Note the line that catches you while reading news and blogs, and keep the source URL with it.
Note the passage that matters while you read the paper, and the source URL stays attached to it.
Save the articles you have no time for now, and pull them from the list when you do.
Add it to Chrome and use it on the tab you already have open.
Free to use