update readme and social preview image

README.md

@@ -59,7 +59,7 @@ So, for the purposes of this theme, a "stylesheet" is a `.css` file used to visu
 
 For best results, set density mode to `Normal` and theme to `Dark` in the customization menu. (right click on the navbar and click "Customize Toolbar...") I strongly recommend using this on [Firefox Nightly](https://www.mozilla.org/firefox/channel/desktop/#nightly) and updating the theme at least weekly. To that end, you might find it easier to clone the repo to your `chrome` folder so you can pull updates quickly.
 
-I also recommend setting the following prefs in `about:config`. There are two preset user.js files in the [prefs directory](/prefs) that can automatically set the prefs for you and prevent Firefox from changing them on update. Just choose one, rename it to user.js, and move it to your _profile_ folder, not your `chrome` folder. The first of these files, [required.js](/prefs/required.js) contains just the bare minimum prefs to ensure functionality, omitting most of the prefs that represent aesthetic choices. The second, [recommended.js](/prefs/recommended.js), includes the required prefs and some other more subjective prefs that compliment the theme — this is the preset I would personally recommend. There are also OS-specific prefs that are not in either file, so you should still check the list below. The following are in alphabetical order, not in order of importance. Most are optional, but the few that are required are in italics and are marked in the Notes column.<details><summary>**_Click for a full list._**</summary>
+I also recommend setting the following prefs in `about:config`. There are two preset user.js files in the [prefs directory](/prefs) that can automatically set the prefs for you and prevent Firefox from changing them on update. Just choose one, rename it to user.js, and move it to your _profile_ folder, not your `chrome` folder. The first of these files, [required.js](/prefs/required.js) contains just the bare minimum prefs to ensure functionality, omitting most of the prefs that represent aesthetic choices. The second, [recommended.js](/prefs/recommended.js), includes the required prefs and some other more subjective prefs that compliment the theme — this is the preset I would personally recommend. There are also OS-specific prefs that are not in either file, so you should still check the list below. The following are in alphabetical order, not in order of importance. Most are optional, but the few that are required are in italics and are marked in the Notes column.<details><summary>⚙ **_Click for a full list._**</summary>
 | Pref&nbsp;name | Type | Value | Notes&nbsp;(optional&nbsp;unless&nbsp;otherwise&nbsp;noted) |
 |- |- |- |- |
 | browser.anchor\_color | String | `#6669ff` | |
@@ -86,6 +86,7 @@ I also recommend setting the following prefs in `about:config`. There are two pr
 | full-screen-api.transition-duration.leave | String | `0 0` | |
 | full-screen-api.warning.delay | Number | -1 | Remove the warning when switching to/from fullscreen |
 | full-screen-api.warning.timeout | Number | 0 | |
+| gfx.color\_management.mode | Number | 0 | Disable [color management](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserSettings/colorManagement). Use a [color calibrator](https://spyderx.datacolor.com/shop-products/display-calibration/) for best results. |
 | gfx.font\_rendering.cleartype\_params.cleartype\_level | Number | 100 | These settings are a major improvement to text rendering on Windows imo. They shouldn't do anything on Mac/Linux |
 | gfx.font\_rendering.cleartype\_params.force\_gdi\_classic\_for\_families | String | `<empty>` | Leave the value completely empty |
 | gfx.font\_rendering.cleartype\_params.force\_gdi\_classic\_max\_size | Number | 6 | |