>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR_1: 1. Open about:preferences#general 2. Set zoom level to 110% or 120% or 130% (or set DPI level to 125%) 3. Click on category "Search" at the left. Click on category "Content", then "Applications" AR: Icons in said categories compress horizontally by ~1px (visually) ER: Icons shouldn't compress/move Notes: 1) This is consequence of bug 477157 that causes problems eveywhere 2) There're 2 ways of fixing this in file chrome://global/skin/in-content/common.css : 1st: replace set of rules .category[selected], .category.selected { background-color: var(--in-content-category-background-active); color: var(--in-content-category-text-selected); padding-inline-start: 11px; border-inline-start: solid 4px var(--in-content-border-highlight); } to .category[selected], .category.selected { background-color: var(--in-content-category-background-active); color: var(--in-content-category-text-selected); /*padding-inline-start: 11px;*/ /*border-inline-start: solid 4px var(--in-content-border-highlight);*/ box-shadow: inset 4px 0px 0px 0px var(--in-content-border-highlight); } 2nd: replace set of rules .category { -moz-appearance: none; color: var(--in-content-category-text); border-inline-end-width: 0; padding-inline-start: 15px; padding-inline-end: 21px; min-height: 40px; transition: background-color 150ms; } to .category { -moz-appearance: none; color: var(--in-content-category-text); border-inline-end-width: 0; /*padding-inline-start: 15px;*/ padding-inline-end: 21px; min-height: 40px; transition: background-color 150ms; /* + */ padding-inline-start: 11px; /* + */ border-inline-start: solid 4px var(--in-content-border-highlight); }