Custom Window Resizer by GenXJay

Quickly resize and reposition your browser window to predefined dimensions with a single click.

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You'll need Firefox to use this extension

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About this extension

Window Resizer lets you create custom presets to instantly resize and reposition your Firefox browser window.

Whether you're a designer testing responsive layouts, a multitasker organizing your screen, or just someone who wants windows in the right place every time — this extension has you covered.

💡 Features:

Define custom width, height, left, and top values
Drag-and-drop to reorder presets
Save and edit unlimited configurations
Import/export settings for backup or sharing
Works with multiple monitors and window arrangements
Tab Explosion: Instantly split all tabs from your current window into a visually organized layout of separate windows. Layouts are optimized for 2, 3, 4, or 5 tabs, making multitasking and comparison effortless.
Gather Tabs: Quickly gather all tabs from all open windows back into a single window, automatically applying your favorite preset for size and position.

Stay organized. Stay productive. Resize smarter.

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Release notes for 2.0

Version 2.0 – Update Notes

Major Changes

Popup UI Redesign

Modernized Popup Layout: The extension popup has been completely redesigned for a cleaner and more intuitive experience.
Options Button Moved: The options/settings button has moved from the bottom of the popup to a gear icon at the top for easier access and a more standard UI feel.
Button Grouping: Action buttons (such as Tab Explosion and Gather Tabs) are now grouped together with a consistent, modern card-like appearance and improved spacing.

New Features

Tab Explosion

Explode All Tabs: Instantly split your current window’s tabs into a visually organized layout of separate windows.
- For 2 tabs: perfect 50/50 split
- For 3 tabs: One window on the left (50% width), two stacked windows on the right (each 50% height).
- For 4 tabs: Windows evenly sized in a 2x2 grid
- For 5 tabs: One window on the left, three stacked in the center, one on the right.
- Layouts are carefully padded and balanced for maximum usability.
How to Use: Click the 💥 Tab Explosion button in the popup. All tabs in the current window will be arranged in separate windows according to the optimized layout.

Gather Tabs

Recombine Windows: Instantly gather all tabs from all open windows back into a single window.
Preset Restore: After gathering, the main window is automatically resized and positioned using your first saved preset for a seamless workflow.
How to Use: Click the 🧲 Gather Tabs button in the popup. All tabs are moved back to one window and the window is resized to your preferred layout.

Thank you for using Window Resizer!
If you enjoy these new features or have feedback, please leave a review or contact us for support.

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