Firefox clear cache issues

Discuss how to use and promote Web standards with the Mozilla Gecko engine.

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Post Posted September 20th, 2015, 10:18 am

If you zoom in/out to the point that the window.innerWidth is 1925px or narrower, or body.offsetWidth is 1900px or narrower, there should not be any white background (more or less, this is difficult to compute on a laptop screen). However, if the body width exceeds those dimensions, a gap appears.

This seems related to using background-size:cover, which enlarges the background image proportionally, meaning the white center column also is enlarged. Can you edit the background image so there is enough photo in the center to compensate for wider displays?

Note: Firefox recomputes these dimensions when you see. Example:


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Post Posted September 21st, 2015, 4:48 am

Moving to Web Development.

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Joined: June 13th, 2013, 4:27 am

Post Posted April 18th, 2016, 5:51 am


Follow steps:

1. Type about:support in the address bar and press enter
2. Under the page logo on the left side you will see Application Basics.
3. Under this find Profile Folder. To it’s right press the button Show Folder. This will open your file browser to the current Firefox profile.
4. Now Close Firefox.
5. Locate the cookies.sqlite file. Then rename or delete it. Restart Firefox.

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