Force Phone View is a Firefox extension created to improve web browsing in narrow windows, such as when using split-screen mode on small laptops. It addresses the common issue where many websites retain their desktop grid layouts even in constrained spaces, resulting in small text and horizontal scrolling. By making websites believe the browser is a mobile device, the extension prompts them to serve a mobile-optimized, column-based layout that is easier to read and navigate.
The extension achieves this effect through several mechanisms. It automatically sends an Android User-Agent string to websites, increasing the likelihood of receiving their mobile versions. Additionally, it constrains the page viewport to 720 pixels, a width that typically triggers mobile-friendly column layouts instead of wider desktop grids. Custom styles are injected to eliminate horizontal scrolling, ensuring all content remains within a single, readable column. Users can toggle the extension's functionality on or off instantly via a button in the Firefox extension popup, allowing for quick adjustments as browsing needs change.
Force Phone View operates in the background and only activates on HTTP and HTTPS sites, which helps maintain both security and stability during browsing sessions. The tool is designed with privacy in mind, as it does not collect any user data. It is implemented as a Manifest V3 extension, aligning with modern performance and security standards for browser extensions. Compatibility is specifically noted for the latest versions of Firefox.
The extension is presented as particularly useful for researchers, students, and anyone who frequently multitasks in side-by-side windows, as it enhances readability and usability of web content in constrained spaces.
Force Phone View is a Browser DevTools & extensions product. It focuses on making websites easier to read in narrow desktop windows by forcing mobile layouts. Force Phone View is a consumer product aimed at desktop browser users needing mobile-friendly layouts. Force Phone View costs nothing to use. It runs on the web and embeddable surfaces.
Behind Force Phone View is Chris Judevine, and the product first shipped in 2026. Across PulseGate's embedding index, Force Phone View has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are mobile spoofing, viewport constraint, and toggle control.
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