Using the background-size cover property in Firefox

While working on a website, I encountered an issue where the background image did not display correctly across different browsers. Specifically, when using the background-size: cover property in Chrome and Safari, the image filled up the entire screen as intended. However, opening the webpage in Firefox revealed that the image appeared too high up with the bottom portion displaying the selected background-color. This inconsistency led me to wonder why this was happening and how I could address it.

In an attempt to rectify the issue, I experimented with additional properties such as -moz-background-size and -moz-background-position, alongside the existing 

background-position: right center
property. Unfortunately, these adjustments did not yield the desired results.

Below is the relevant CSS code snippet:

-moz-background-size: cover;
background-size: cover;
-moz-background-position: right center;
background-position: right center;

UPDATE: To see the issue in action, you can visit the website here: crowdsparked.com

cssfirefoxbackground-image

Answer №1

We recommend utilizing the following CSS style:

background-attachment: fixed;

Answer №2

Dealing with a comparable issue, I discovered that even though the background-size was covering the screen, the body's height didn't span the entire screen. As a result, when I tried positioning something 50% down from the top, it ended up much higher than intended. Adding width: 100% and height: 100% resolved this issue (along with margin: 0px to prevent a scroll bar).

Answer №3

Give this a shot in your CSS:

background-size: contain;
//or you can try:
background-size: cover;

No need for prefixes with these options. Check out the Mozilla specification for a detailed explanation:

Contain

When using the contain value, the background image will be scaled to fit the container box while maintaining aspect ratio.

Cover

With the cover value, the background image will be sized to cover the entire container box while also maintaining aspect ratio.

Learn more about scaling background images on MDN

Explore the background-size property on MDN

Answer №4

background-attachment: fixed;

This feature is functioning properly in the Firefox browser.

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