Glasp for Firefox tech stack
Highlight and summarize any page, PDF, or video in Firefox
The stack
“Firebase is the reason a highlight you make in Firefox shows up on your phone a second later. Firestore backs our sync and Auth means signing into a new browser is one tap with an account you already have, so "nothing to migrate" is a real promise rather than…” — the maker, Aug 2026 ↗
“glasp.co runs on Next.js, and the Firefox extension leans on it more than it looks. Every highlight the extension saves also has a page on the web that renders server side, which is what makes a highlight shareable and findable instead of trapped inside one br…” — the maker, Aug 2026 ↗
“We ported Glasp to Firefox largely with Claude Code. The hard part of a browser port is not the new code, it is the hundreds of small places where an existing codebase quietly assumes one browser. Claude Code holds enough of our monorepo in context to find tho…” — the maker, Aug 2026 ↗