Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

Search Support

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.

Learn More
Solved Archived

[Solved] Firefox Quantum 57.0 open new page in tabs white flash background color

soda7945 replied
soda7945

Firefox Quantum 57.0 new tabs still show default background color for a split second before changing to the preferred color.

This causes a flash like effect, which is bad for eyes and the monitors... The previous versions are working fine, so there is something in this version that causes this. Please advise. Thanks

Firefox Quantum 57.0 new tabs still show default background color for a split second before changing to the preferred color. This causes a flash like effect, which is bad for eyes and the monitors... The previous versions are working fine, so there is something in this version that causes this. Please advise. Thanks

Modified by soda7945

All Replies (3)

Chosen Solution

Solved! See references: http://kb.mozillazine.org/index.php?title=UserChrome.css&printable=yes http://forums.mozillazine.org/viewtopic.php?f=23&t=2138435

make the folder called "chrome" under your firefox profile then make the text file called userChrome.css type the following into it

@namespace url("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"); /*Prevents White pre-load flash*/ tabbrowser tabpanels { background-color: black !important; }

then restart Firefox!

Could you please Mark your Solution as the Solution so that others may find it. Thank You.

Pkshadow. I don't know how to do that as I don't see a button saying "Click here to mark this solution as the solution...", although I have chosen that solution as the solution. Is that it?