Redline by TheAnarchoX

Redline is a local-first Firefox research companion. Save web pages with notes, tags, reading status, importance, and dossier links. Capture selected passages as highlights, claims, sources, questions, follow-ups, and other annotations, then search and organize the resulting local library.

The sidebar supports capture while reading, while the library brings together saved pages, annotations, dossiers, tags, and links. Redline can generate local JSON, CSV, XML, Markdown, BibTeX, RIS, CSL JSON, EndNote XML, bibliography, and academic Markdown exports. JSON imports are parsed, validated, checked for duplicates, and resolved locally.

• Save the current page or a linked source as a local record.
• Annotate selected page text from the floating selection menu or context menu.
• Classify findings and attach notes, tags, and dossiers.
• Restore compatible highlights using saved text and nearby context.
• Search pages, notes, annotations, dossiers, and links locally.
• Export and back up research in multiple portable formats.

Keep a traceable research trail without relying on a Redline account or cloud sync service. Your research vault remains in Firefox’s browser-managed local storage unless you choose to export it.