version 0.0.1 done

.gitignore

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+src.pem

src/jump.js

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+function initJumpBtn() {
+  const toolsEle = document.getElementsByClassName('css-nj515r-Tools e171bd604')[0];
+  var btn = document.createElement('button');
+  btn.setAttribute('class', 'css-atw98h-Button e167268t1 cn-to-com-btn');
+  targetPath = window.location.pathname.replace(/(\/\w+\/[\w-]+)(\/\w+)+/g, '$1');
+  btn.innerHTML = `<span><a href="https://leetcode.com${targetPath}discuss/?currentPage=1&orderBy=most_votes" target="_blank">国际站高票讨论</a></span>`;
+  toolsEle.appendChild(btn);
+}
+
+function init() {
+  initJumpBtn();
+}
+
+window.addEventListener("load", init);
+// Icons made by <a href="https://www.flaticon.com/authors/monkik" title="monkik">monkik</a> from <a href="https://www.flaticon.com/" title="Flaticon"> www.flaticon.com</a>

src/manifest.json

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+{
+  "name": "Leetcode cn to com Extension",
+  "description": "Go to global site with one click",
+  "author": "NoEgAm",
+  "version": "0.0.1",
+  "browser_action": {
+    "default_icon": {
+      "16": "icon16.png",
+      "48": "icon48.png",
+      "128": "icon128.png"
+    }
+  },
+  "manifest_version": 2,
+  "commands": {
+    "_execute_browser_action": {
+      "suggested_key": {
+        "default": "Ctrl+Shift+F",
+        "mac": "MacCtrl+Shift+F"
+      }
+    }
+  },
+  "icons": {
+    "16": "icon16.png",
+    "48": "icon48.png",
+    "128": "icon128.png"
+  },
+  "content_scripts": [{
+    "matches": [
+      "https://leetcode-cn.com/problems/*"
+    ],
+    "js": ["jump.js"]
+  }],
+  "permissions": [
+    "*://*.leetcode-cn.com/*"
+  ]
+}