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Brief overview
This Firefox add-on makes it simple to shrink your browser window to standard webpage widths so you can reclaim desktop space or preview layouts at common sizes. It provides a one-click switch between two widely used page widths and adds a convenient control to the browser interface.
Key features
- Automatic detection of the appropriate layout and automatic adjustment of the browser width
- A toolbar control for instant switching with a single click
- Preset width options: 1024 pixels and 800 pixels
- Frees up screen real estate by compressing the browser to a fixed width
- Handy for designers who need to test how pages render at different sizes
- Currently released as a Firefox-only extension
How it works
After installation, the add-on places a new icon in Firefox’s toolbar. Clicking that icon toggles the browser viewport between the two presets, and the extension will try to pick the right display mode automatically so you don’t have to fiddle with settings each time.
Who should use it
- People who want to maximize available desktop space by narrowing their browser window
- Web developers and designers who need quick checks of page appearance at standard widths
- Anyone who prefers a compact, fixed-width browsing environment
Installation and usage tips
Install the extension from the Firefox add-ons site, pin the toolbar button for easy access, and click it whenever you want to switch sizes. If you rely on precise measurements while testing, confirm the viewport width with a developer tool after toggling.
Recommended alternative
- Minecraft: Java & Bedrock Edition (paid)
Technical
- Mac
- Free
