Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

Avatar for Username

সহায়তা খুঁজুন

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

আরও জানুন

এই থ্রেডটি সংরক্ষিত ছিল। যদি আপনি সাহায্য চান তাহলে অনুগ্রহ করে একটি নতুন প্রশ্ন জিজ্ঞাসা করুন

I use non fullscreen Firefox window - have to scroll horizontally. Can I spoof screen resolution information?

  • 1 উত্তর
  • 5 এই সমস্যাটি আছে
  • 14 দেখুন
  • শেষ জবাব দ্বারা cor-el

mlesmana
mlesmana
more options

Screen resolution information captured by Javascript shows the full monitor resolution. Meanwhile I don't maximize my Firefox (use Windows left and right snap). It seems to me that many websites use this info to decide how to render a page. Thus rendering wide pages that require me to scroll horizontally - even on https://support.mozilla.org/en-US/home

I have tried the FireSizer add on but it did not help. FireSizer only changes my browser windows size, websites (e.g. http://www.whatismyscreenresolution.com/) still reported my full screen resolution and not the browser windows size.

I know that I can use the zoom functionality, but that tends to render text too small for comfort.

Additional info: - monitor resolution: 1920x1200

Screen resolution information captured by Javascript shows the full monitor resolution. Meanwhile I don't maximize my Firefox (use Windows left and right snap). It seems to me that many websites use this info to decide how to render a page. Thus rendering wide pages that require me to scroll horizontally - even on https://support.mozilla.org/en-US/home I have tried the FireSizer add on but it did not help. FireSizer only changes my browser windows size, websites (e.g. http://www.whatismyscreenresolution.com/) still reported my full screen resolution and not the browser windows size. I know that I can use the zoom functionality, but that tends to render text too small for comfort. Additional info: - monitor resolution: 1920x1200

All Replies (1)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

That depends which window and screen properties a website checks via JavaScript.

You can check out on the browserspy website how websites see your windows settings:

Copy and paste this code in the command line in the Web Console (Web Developer > Web Console; Ctrl+Shift+K) and press the Enter key. 

alert("Current Window: "+window.outerWidth+" x "+window.outerHeight+"\nScreen Available: "+screen.availWidth+" x "+screen.availHeight+"\nFull Screen Size: "+screen.width+" x "+screen.height+"\n\nwindow.outerWidth="+window.outerWidth+"\nwindow.outerHeight="+window.outerHeight+"\n\nwindow.innerWidth="+window.innerWidth+"\nwindow.innerHeight="+window.innerHeight);