You search the same problem again and click the same useless pages. Your browser only remembers that you visited a link. Déjà Vu remembers whether it helped.
Works in Chrome, Edge and Brave. No account.

On Google, Bing, DuckDuckGo, Reddit, forums and everywhere else. ✓ read 4 min: it helped. ✗ left after 6 s: useless, the link is dimmed. ◐ 40%: half-read. Only real reading time counts: a forgotten background tab doesn’t.

Type two words you remember. Déjà Vu finds the page and shows you the passage, highlighted. Accents, capitals and word order don’t matter.

Back on a long article you dropped halfway? “You stopped at 65%”. One click and you’re back on your line.

No payment for now: Déjà Vu Pro is in preparation.
No. Everything is stored in your browser, and the extension has no network access at all. Even your Pro license is verified offline, with a cryptographic signature.
Time with the tab visible while you interact with the page (or a video is playing). A tab left open in the background doesn’t count.
Badges appear on any website with links. Menus, headers and footers are left alone so it stays quiet.
Pro searches pages read since you installed Déjà Vu. Text is saved locally after 15 seconds of reading, even on the free version, so upgrading unlocks everything you’ve read so far.
Chrome, and Chromium browsers that install from the Chrome Web Store, like Edge and Brave.