docs: chrome badge

README.md

@@ -4,28 +4,32 @@ Yet another Chrome extension for GitHub. Inspired by [Octotree](https://github.c
 
 ### Features
 
-- [x] neat file tree
-- [x] instant file search
-- [x] fast even in gigantic projects
-- [x] intuitive keyboard accessibility
+- neat file tree
+- instant file search
+- fast even in gigantic projects
+- intuitive keyboard accessibility
   - file navigation using arrow keys
   - set shortcut to toggle sidebar
-- [x] redirect smoothly with pjax
-- [x] resize-able when window is wide enough
-- [x] copy snippets with single click
+- redirect smoothly with pjax
+- resize-able when window is wide enough
+- copy snippets with single click
   - copy code snippets from markdown preview
   - copy whole content of a file
-- [x] support private repo and frequent usages
-- [x] support git submodule
-- [x] UI consistent to GitHub's
-- [x] light size (~60kb) & low memory usage
+- support private repo and frequent usages
+- support git submodule
+- UI consistent to GitHub's
+- light size (~60kb) & low memory usage
 - [more WIP](https://github.com/EnixCoda/Gitako/projects/1)
 
 [Change Log](https://github.com/EnixCoda/Gitako/wiki/ChangeLog)
 
 ### Install
 
-[Please install from Chrome Web Store](https://chrome.google.com/webstore/detail/gitako/giljefjcheohhamkjphiebfjnlphnokk)
+<div style="max-width: 300px">
+
+[![Please install from Chrome Web Store](./ChromeWebStoreBadge.svg)](https://chrome.google.com/webstore/detail/gitako-github-file-tree/giljefjcheohhamkjphiebfjnlphnokk)
+
+</div>
 
 ### Issues
 
@@ -34,6 +38,7 @@ Any bug report or feature request discussions are welcomed, feel free to draft a
 ### About
 
 #### Why named 'Gitako'?
+
 GitHub's totem is a cute octopus. And octopus in Japanese is `たこ`(tako).
 Then link them together: