Rated 3 out of 5 stars
Gray shades of color, useful to check color banding or color depth of your monitor. ;)
Add to Thunderbird
Rated 4 out of 5 stars
by Firefox user 3fbaf9 on April 8, 2018
I don't like this themes, i want my complete themes back >:/
Rated 1 out of 5 stars
by Prince W. Cantodea on Nov. 16, 2017
See all 2 reviews of this add-on
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