FlexHeaders makes it easy to modify HTTP request and response headers directly from your browser. Create pages for different websites, environments or scenarios; add regex or url filters and pause pages at any time. Key Features: -🛡️ Add, Modify and Remove HTTP headers for any request -♾️ Sync functionality for cross browser syncing (chrome profile) -🔧 Export/Import feature to share with colleagues or friends -🔓 Open Source, you can find the source code here: https://github.com/harrisondeo/FlexHeader -🔀 Import ModHeader export JSON allowing you to get back working easily. -💼 Enable multiple pages at same time -🌐 URL & Regex filtering for all pages -🔎 Header searching -📝 Header comments so you can annotate -✨ Autocomplete for common header names -⏫ Sort headers by name, comment or value -↩️ Undo and redo changes -🌙 Light & dark mode -↔️ Collapsible sidebar Advanced features include being able to drag & drop reorder headers, set the font size within the popup, enable/disable all headers with 1 button, sync config across same chrome profile on different browsers/computers. Edit HTTP Headers easily with FlexHeaders, an open-source Chrome extension designed for developers and privacy-conscious users who need to modify or edit HTTP request headers on the fly.