This theme is meant to be used with the i3 tiling window manager. It turns the top bar of Chrome/Chromium blue when the window is focused, dark grey when not. Thus, it matches the default behaviour of i3 itself.
This is handy because it allows you to disable i3's titlebar/borders on the Chrome/Chromium window (which causes the browser tabs to touch the top edge of the screen, making them easier to select) and still get the blue/grey visual feedback of whether the window has focus.
This theme is meant specifically to be used with "fidiri" (Fedora + i3), so the precise shade of blue is "Fedora blue".
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!