diff --git a/scripts/build.mjs b/scripts/build.mjs
index 21d4554..7e7c6f8 100644
--- a/scripts/build.mjs
+++ b/scripts/build.mjs
@@ -18,6 +18,10 @@ import details from "../package.json" assert { type: "json" };
 
 const { name, author, description, homepage, version, config } = details;
 
+const t = new Date();
+const buildTime = dateFormat("YYYY-mm-dd HH:MM:SS", new Date());
+const buildDir = "build";
+
 function copyFileSync(source, target) {
   var targetFile = target;
 
@@ -84,76 +88,7 @@ function dateFormat(fmt, date) {
   return fmt;
 }
 
-async function main() {
-  const t = new Date();
-  const buildTime = dateFormat("YYYY-mm-dd HH:MM:SS", t);
-  const buildDir = "build";
-
-  console.log(
-    `[Build] BUILD_DIR=${buildDir}, VERSION=${version}, BUILD_TIME=${buildTime}, ENV=${[
-      env.NODE_ENV,
-    ]}`
-  );
-
-  clearFolder(buildDir);
-
-  copyFolderRecursiveSync("addon", buildDir);
-
-  copyFileSync("update-template.json", "update.json");
-
-  await build({
-    entryPoints: ["src/index.ts"],
-    define: {
-      __env__: `"${env.NODE_ENV}"`,
-    },
-    bundle: true,
-    outfile: join(buildDir, "addon/chrome/content/scripts/index.js"),
-    // Don't turn minify on
-    // minify: true,
-  }).catch(() => exit(1));
-
-  console.log("[Build] Run esbuild OK");
-
-  const replaceFrom = [
-    /__author__/g,
-    /__description__/g,
-    /__homepage__/g,
-    /__buildVersion__/g,
-    /__buildTime__/g,
-  ];
-
-  const replaceTo = [author, description, homepage, version, buildTime];
-
-  replaceFrom.push(
-    ...Object.keys(config).map((k) => new RegExp(`__${k}__`, "g"))
-  );
-  replaceTo.push(...Object.values(config));
-
-  const optionsAddon = {
-    files: [
-      join(buildDir, "**/*.xhtml"),
-      join(buildDir, "**/*.json"),
-      join(buildDir, "addon/prefs.js"),
-      join(buildDir, "addon/manifest.json"),
-      join(buildDir, "addon/bootstrap.js"),
-      "update.json",
-    ],
-    from: replaceFrom,
-    to: replaceTo,
-    countMatches: true,
-  };
-
-  const replaceResult = sync(optionsAddon);
-  console.log(
-    "[Build] Run replace in ",
-    replaceResult
-      .filter((f) => f.hasChanged)
-      .map((f) => `${f.file} : ${f.numReplacements} / ${f.numMatches}`)
-  );
-
-  console.log("[Build] Replace OK");
-
-  // Walk the builds/addon/locale folder's sub folders and rename *.ftl to addonRef-*.ftl
+function renameLocaleFiles() {
   const localeDir = join(buildDir, "addon/locale");
   const localeFolders = readdirSync(localeDir, { withFileTypes: true })
     .filter((dirent) => dirent.isDirectory())
@@ -176,6 +111,135 @@ async function main() {
       }
     }
   }
+}
+
+function replaceString() {
+  const replaceFrom = [
+    /__author__/g,
+    /__description__/g,
+    /__homepage__/g,
+    /__buildVersion__/g,
+    /__buildTime__/g,
+  ];
+  const replaceTo = [author, description, homepage, version, buildTime];
+
+  replaceFrom.push(
+    ...Object.keys(config).map((k) => new RegExp(`__${k}__`, "g"))
+  );
+  replaceTo.push(...Object.values(config));
+
+  const optionsAddon = {
+    files: [
+      join(buildDir, "**/*.xhtml"),
+      join(buildDir, "**/*.json"),
+      join(buildDir, "addon/prefs.js"),
+      join(buildDir, "addon/manifest.json"),
+      join(buildDir, "addon/bootstrap.js"),
+      "update.json",
+    ],
+    from: replaceFrom,
+    to: replaceTo,
+    countMatches: true,
+  };
+
+  const replaceResult = sync(optionsAddon);
+
+  const localeMessage = new Set();
+  const localeMessageMiss = new Set();
+
+  const replaceResultFlt = sync({
+    files: [join(buildDir, "addon/**/*.ftl")],
+    processor: (fltContent) => {
+      const lines = fltContent.split("\n");
+      const prefixedLines = lines.map((line) => {
+        // https://regex101.com/r/lQ9x5p/1
+        const match = line.match(
+          /^(?<message>[a-zA-Z]\S*)([ ]*=[ ]*)(?<pattern>.*)$/m
+        );
+        if (match) {
+          localeMessage.add(match.groups.message);
+          return `${config.addonRef}-${line}`;
+        } else {
+          return line;
+        }
+      });
+      return prefixedLines.join("\n");
+    },
+  });
+
+  const replaceResultXhtml = sync({
+    files: [join(buildDir, "addon/**/*.xhtml")],
+    processor: (input) => {
+      const matchs = [...input.matchAll(/(data-l10n-id)="(\S*)"/g)];
+      matchs.map((match) => {
+        if (localeMessage.has(match[2])) {
+          input = input.replace(
+            match[0],
+            `${match[1]}="${config.addonRef}-${match[2]}"`
+          );
+        } else {
+          localeMessageMiss.add(match[2]);
+        }
+      });
+      return input;
+    },
+  });
+
+  console.log(
+    "[Build] Run replace in ",
+    replaceResult
+      .filter((f) => f.hasChanged)
+      .map((f) => `${f.file} : ${f.numReplacements} / ${f.numMatches}`),
+    replaceResultFlt.filter((f) => f.hasChanged).map((f) => `${f.file} : OK`),
+    replaceResultXhtml.filter((f) => f.hasChanged).map((f) => `${f.file} : OK`)
+  );
+
+  if (localeMessageMiss.size !== 0) {
+    console.warn(
+      `[Build] [Warn] Fluent message [${new Array(
+        ...localeMessageMiss
+      )}] do not exsit in addon's locale files.`
+    );
+  }
+}
+
+async function esbuild() {
+  await build({
+    entryPoints: ["src/index.ts"],
+    define: {
+      __env__: `"${env.NODE_ENV}"`,
+    },
+    bundle: true,
+    target: "firefox102",
+    outfile: join(buildDir, "addon/chrome/content/scripts/index.js"),
+    // Don't turn minify on
+    // minify: true,
+  }).catch(() => exit(1));
+}
+
+async function main() {
+  console.log(
+    `[Build] BUILD_DIR=${buildDir}, VERSION=${version}, BUILD_TIME=${buildTime}, ENV=${[
+      env.NODE_ENV,
+    ]}`
+  );
+
+  clearFolder(buildDir);
+
+  copyFolderRecursiveSync("addon", buildDir);
+
+  copyFileSync("update-template.json", "update.json");
+
+  await esbuild();
+
+  console.log("[Build] Run esbuild OK");
+
+  replaceString();
+
+  console.log("[Build] Replace OK");
+
+  // Walk the builds/addon/locale folder's sub folders and rename *.ftl to addonRef-*.ftl
+  renameLocaleFiles();
 
   console.log("[Build] Addon prepare OK");
 
diff --git a/src/utils/locale.ts b/src/utils/locale.ts
index 516dec5..2642675 100644
--- a/src/utils/locale.ts
+++ b/src/utils/locale.ts
@@ -63,16 +63,17 @@ function _getString(
   localString: string,
   options: { branch?: string | undefined; args?: Record<string, unknown> } = {}
 ): string {
+  const localStringWithPrefix = `${config.addonRef}-${localString}`;
   const { branch, args } = options;
   const pattern = addon.data.locale?.current.formatMessagesSync([
-    { id: localString, args },
+    { id: localStringWithPrefix, args },
   ])[0];
   if (!pattern) {
-    return localString;
+    return localStringWithPrefix;
   }
   if (branch && pattern.attributes) {
-    return pattern.attributes[branch] || localString;
+    return pattern.attributes[branch] || localStringWithPrefix;
   } else {
-    return pattern.value || localString;
+    return pattern.value || localStringWithPrefix;
   }
 }