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They both support major streaming platforms and offer keyboard shortcuts.",[21,34,35],{},"But the feature set, interface quality, and trustworthiness are very different.",[16,37,39],{"id":38},"side-by-side-comparison","Side-by-Side Comparison",[41,42],"comparison-table",{":features":43,"category":44,"ourName":27,"theirName":31},"[{\"name\":\"Active Users\",\"ours\":\"80,000+\",\"theirs\":\"~100,000\"},{\"name\":\"Average Rating\",\"ours\":\"4.5\",\"theirs\":\"3.9\"},{\"name\":\"Chrome\",\"ours\":\"yes\",\"theirs\":\"yes\"},{\"name\":\"Firefox\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Last Updated (Chrome)\",\"ours\":\"2026-03-18\",\"theirs\":\"2025-10-26\"},{\"name\":\"Pricing\",\"ours\":\"Freemium\",\"theirs\":\"Free\"}]","Store",[41,46],{":features":47,"category":48,"ourName":27,"theirName":31},"[{\"name\":\"Fill \u002F Stretch \u002F Custom Modes\",\"ours\":\"yes\",\"theirs\":\"partial\"},{\"name\":\"Scale & Pan Controls\",\"ours\":\"yes\",\"theirs\":\"Zoom only\"},{\"name\":\"Works Everywhere\",\"ours\":\"yes\",\"theirs\":\"partial\"},{\"name\":\"Works in Fullscreen\",\"ours\":\"yes\",\"theirs\":\"yes\"},{\"name\":\"Works Inline\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Per-Host Settings\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Per-Path Settings\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Letterbox Crop (baked-in black bars)\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Ambient Light Effect\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Video Sharpening (Enhance)\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"AI Voice Control\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Mode Manager\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Auto-Hide Trigger\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"X\u002FY Mirror Controls\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Cross-Browser Sync\",\"ours\":\"Pro\",\"theirs\":\"no\"},{\"name\":\"Keyboard Shortcuts\",\"ours\":\"yes\",\"theirs\":\"yes\"},{\"name\":\"Scroll & Pinch Gestures\",\"ours\":\"yes\",\"theirs\":\"no\"}]","Functionality",[41,50],{":features":51,"category":52,"ourName":27,"theirName":31},"[{\"name\":\"Floating In-Page Panel\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"In-Player Button\",\"ours\":\"no\",\"theirs\":\"yes\"},{\"name\":\"Draggable Panel Position\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Clean, Minimal Design\",\"ours\":\"yes\",\"theirs\":\"partial\"},{\"name\":\"Dark & Light Mode\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Accent Color Customization\",\"ours\":\"16 colors\",\"theirs\":\"no\"},{\"name\":\"Smooth Animations\",\"ours\":\"yes\",\"theirs\":\"no\"}]","Interface",[41,54],{":features":55,"category":56,"ourName":27,"theirName":31},"[{\"name\":\"Keyboard Navigation\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Screen Reader Support\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Multiple Languages\",\"ours\":\"40+ languages\",\"theirs\":\"55 languages\"},{\"name\":\"Instant Language Switching\",\"ours\":\"yes\",\"theirs\":\"no\"},{\"name\":\"Customizable Shortcuts\",\"ours\":\"yes\",\"theirs\":\"yes\"}]","Accessibility",[16,58,60],{"id":59},"the-interface","The Interface",[21,62,63,65],{},[25,64,27],{}," features a floating in-page panel that you can drag anywhere on screen. It supports dark and light mode, offers 16 accent colors, and is fully accessible. You can switch between 40+ languages instantly without restarting your browser.",[21,67,68,70],{},[25,69,31],{}," uses a browser popup with an in-player button that appears on supported streaming sites. The in-player button is convenient for quick toggling, but the overall interface is more basic – no theming and no accessibility features.",[16,72,74],{"id":73},"trust-security","Trust & Security",[21,76,77,78,81],{},"This is worth calling out. ",[25,79,80],{},"Zoom to Fill has received reports of security concerns"," – users have flagged that the developer's homepage redirected to scam\u002Fphishing sites. Some users reported adware behavior with tabs opening to unrelated extensions.",[21,83,84,87],{},[25,85,86],{},"UltraWideo has a clean reputation"," with no security complaints, minimal permissions, and transparent privacy practices.",[16,89,91],{"id":90},"firefox-support","Firefox Support",[21,93,94,97],{},[25,95,96],{},"UltraWideo fully supports Firefox"," with the same features and experience as Chrome.",[21,99,100,103],{},[25,101,102],{},"Zoom to Fill does not support Firefox."," There is a legacy listing on the Firefox Add-ons store, but it hasn't been updated since 2022 and is no longer functional.",[16,105,107],{"id":106},"whats-new-in-40","What's New in 4.0",[21,109,110],{},"The latest UltraWideo release adds features Zoom to Fill doesn't have:",[112,113,114,121,127,133,139,145],"ul",{},[115,116,117,120],"li",{},[25,118,119],{},"Letterbox detection"," with a Measure tool that crops baked-in black bars even on protected streams",[115,122,123,126],{},[25,124,125],{},"AI Voice Control"," – speak a setting and the extension applies it",[115,128,129,132],{},[25,130,131],{},"Mode Manager"," to hide modes you never use",[115,134,135,138],{},[25,136,137],{},"Auto-hide trigger"," that fades the floating button during playback",[115,140,141,144],{},[25,142,143],{},"X\u002FY Mirror controls"," – adjust one axis and the other follows",[115,146,147,150],{},[25,148,149],{},"Adaptive Enhance"," sharpening that scales with source resolution",[16,152,154],{"id":153},"what-makes-each-one-stand-out","What Makes Each One Stand Out",[156,157],"pros-cons",{":cons":158,":pros":159,"name":27},"[]","[\"Beautiful, accessible interface anyone can use\",\"Works everywhere – every site, every video\",\"Full Chrome and Firefox support\",\"Gesture controls (scroll wheel, trackpad pinch, touchscreen)\",\"Clean security reputation\",\"Letterbox detection with Measure tool for protected streams (Pro)\",\"AI voice control – speak a setting and it applies (Pro)\",\"Ambient light and adaptive video sharpening (Pro)\",\"Mode Manager and auto-hide trigger for a tidier panel (Pro)\",\"Settings sync across browsers (Pro)\",\"40+ languages with instant switching – no browser restart needed\"]",[156,161],{":cons":162,":pros":163,"name":31},"[\"Security and privacy concerns reported by users\",\"No Firefox support\",\"No per-site settings, voice control, or mode manager\",\"No letterbox detection for baked-in black bars\",\"No gesture, scroll, or pinch support\",\"No ambient light or adaptive sharpening\",\"No settings sync\",\"No instant language switching\",\"No accessibility features\",\"No dark\u002Flight mode\"]","[\"Completely free\",\"In-player button on supported sites\",\"Customizable keyboard shortcuts\",\"Persistent zoom within tab session\"]",[16,165,167],{"id":166},"who-should-pick-what","Who Should Pick What?",[21,169,170,173],{},[25,171,172],{},"Pick UltraWideo if you value reliability, security, and a polished interface."," It works on both Chrome and Firefox, has no security red flags, and the free tier covers all core modes. Pro adds ambient light, per-host settings, and cross-browser sync.",[21,175,176,179],{},[25,177,178],{},"Pick Zoom to Fill if you want a simple, free in-player zoom button"," and only use Chrome. Be aware of the reported security concerns and the fact that the Firefox version hasn't been updated in years.",[181,182,183],"compare-verdict",{},[21,184,185],{},"UltraWideo is the more trustworthy, feature-rich choice – especially if you care about security and cross-browser support. Try it free and see the difference.",{"title":187,"searchDepth":188,"depth":188,"links":189},"",2,[190,191,192,193,194,195,196,197],{"id":18,"depth":188,"text":19},{"id":38,"depth":188,"text":39},{"id":59,"depth":188,"text":60},{"id":73,"depth":188,"text":74},{"id":90,"depth":188,"text":91},{"id":106,"depth":188,"text":107},{"id":153,"depth":188,"text":154},{"id":166,"depth":188,"text":167},"A side-by-side comparison of UltraWideo and Zoom to Fill – two browser extensions that remove black bars on ultrawide monitors.","md",{},true,"\u002Fcompare\u002Fultrawideo-vs-zoom-to-fill",null,{"title":11,"description":198},{"loc":202,"lastmod":206},"2026-03-23","compare\u002Fultrawideo-vs-zoom-to-fill","woi7hB3ScYMgCU007cFzij64DFnfN9zQrdXAGm4ZLfM",1784284781854]