A tiny floating button on Perplexity that shows your remaining Pro searches, Research, Labs usage, and upload limit — live, with auto-refresh.
.zip file — save it somewhere easy to find like your Desktop or Downloads folder. Then unzip it (double-click on Mac, right-click → Extract All on Windows).
chrome://extensions. In the top-right corner, toggle on Developer Mode. Then click Load unpacked and select the perplexity-usage-ext folder (not the zip, the folder inside it).