Screenshot2HTML

Screenshot2HTML is a powerful Firefox extension designed to capture full webpage screenshots and save them as offline HTML files. Unlike the built-in Firefox screenshot tool, it offers unlimited capture areas with automatic image splitting and supports embedding selectable text for easier content use.

Key features include saving images in PNG or JPEG formats, right-to-left scrolling support, and full functioning even on older Firefox versions (from v52). The extension requires no network connection and prioritizes portability by producing a single HTML file accompanied by images. Although it does not capture dynamic JavaScript or CSS stylesheets, it remains ideal for static content archival. Users are advised to disable lazy loading in Firefox to capture all dynamic content. For those needing single-image screenshots, an experimental alternative called Infinite Screenshots is recommended. Future support for AVIF format promises superior compression and cross-platform screenshots.