diff --git a/package.json b/package.json
index d4a9658b..fbfa2c6d 100644
--- a/package.json
+++ b/package.json
@@ -118,6 +118,7 @@
     "pre-commit": "^1.2.2",
     "prettier": "^1.19.1",
     "pump": "^3.0.0",
+    "semver": "^7.3.4",
     "style-loader": "^0.23.1",
     "terser-webpack-plugin": "^2.3.1",
     "ts-import-plugin": "^1.5.5",
diff --git a/webpack/getVersion.js b/webpack/getVersion.js
new file mode 100644
index 00000000..d6899d20
--- /dev/null
+++ b/webpack/getVersion.js
@@ -0,0 +1,17 @@
+const semver = require('semver');
+const { execSync } = require('child_process');
+
+const branch = process.env.GITHUB_BRANCH || 'refs/heads/master';
+const masterCommitsCount = execSync(`git rev-list --count ${branch}`)
+  .toString()
+  .trim();
+
+function getVersion(version) {
+  const currentVersion = semver.parse(version);
+  if (Array.isArray(currentVersion.prerelease) && currentVersion.prerelease.length > 0) {
+    return semver.coerce(version).version.replace(/.[0-9]$/, `.${masterCommitsCount}`);
+  }
+  return version;
+}
+
+module.exports = getVersion;
diff --git a/webpack/webpack.common.js b/webpack/webpack.common.js
index 9f759cd1..0b3cd7ca 100644
--- a/webpack/webpack.common.js
+++ b/webpack/webpack.common.js
@@ -7,6 +7,7 @@ const ExtensionReloader = require('webpack-extension-reloader');
 const tsImportPluginFactory = require('ts-import-plugin');
 const WebpackCreateExtensionManifestPlugin = require('webpack-create-extension-manifest-plugin');
 const fs = require('fs');
+const getVersion = require('./getVersion');
 
 const distFiles = fs.readdirSync(resolve('dist')).filter(o => o !== '.gitkeep');
 
@@ -14,8 +15,11 @@ function resolve(dir) {
   return path.join(__dirname, '..', dir);
 }
 
+const packageJson = JSON.parse(fs.readFileSync(resolve('package.json'), 'utf8'));
+
 let manifestExtra = {
   name: 'Web Clipper',
+  version: getVersion(packageJson.version),
   permissions: [
     'activeTab',
     'storage',
@@ -40,6 +44,7 @@ let tool = resolve('src/main/tool.main.chrome.ts');
 if (process.env.TARGET_BROWSER === 'Firefox') {
   manifestExtra = {
     name: 'Web Clipper',
+    version: getVersion(packageJson.version),
     commands: {
       'toggle-feature-foo': {
         suggested_key: {
diff --git a/yarn.lock b/yarn.lock
index 644d000f..fe16f2f4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -8510,6 +8510,13 @@ semver@^7.3.2:
   dependencies:
     lru-cache "^6.0.0"
 
+semver@^7.3.4:
+  version "7.3.4"
+  resolved "https://registry.npm.taobao.org/semver/download/semver-7.3.4.tgz#27aaa7d2e4ca76452f98d3add093a72c943edc97"
+  integrity sha1-J6qn0uTKdkUvmNOt0JOnLJQ+3Jc=
+  dependencies:
+    lru-cache "^6.0.0"
+
 serialize-javascript@^4.0.0:
   version "4.0.0"
   resolved "https://registry.npm.taobao.org/serialize-javascript/download/serialize-javascript-4.0.0.tgz#b525e1238489a5ecfc42afacc3fe99e666f4b1aa"