QuickHighlighter by Luis Declan

QuickHighlighter highlights the text you select on a page and saves simple metadata (page URL, selected text, timestamp) locally so you can quickly review what you highlighted on a given page. The extension injects the highlighting script only when you explicitly ask (via the popup) so it does not run on pages unless you trigger it. No remote resources are loaded; all code is packaged inside the add-on and the extension uses only the activeTab permission for injection and storage for saving highlights. The first 250 characters of this description summarize the key points: highlights selected text, saves simple metadata locally, injects code only on user gesture, and does not load remote code.