diff --git a/README.md b/README.md
index 562f10a..2f517b1 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ English | [简体中文](README.zh-CN.md)
 
 # Cat-Printer
 
-*A friendly cat printer App/driver for everyone (GB01,GB02,GT01)*
+*A friendly cat (kitty) printer App/driver for everyone (GB01,GB02,GT01)*
 
 ![Poster](https://repository-images.githubusercontent.com/403563361/0a315f6a-7cae-48d7-bfd4-d6fac5415d7c)
 
@@ -17,7 +17,7 @@ English | [简体中文](README.zh-CN.md)
 
 ## How to use
 
-On Windows:
+On Windows 10:
 
 - Get a release, extract, open `start.bat`.
 - Make sure bluetooth of your computer is opened and cat printer is launched.
@@ -27,6 +27,13 @@ On GNU/Linux:
 - You can also use a Windows release, or prepare dependencies according to developer note.
 - Open `server.py` in `printer` folder with `python3`.
 
+Notes:
+
+- Newest Firefox users need to manually allow the permission of extracting canvas data, at left side of address bar after clicking preview button
+- Windows version needs to be at least 10 (`10.0.16299`)
+- GNU/Linux needs BlueZ (`bluetoothctl`)
+- Maybe also compatible to Mac (Darwin) with CoreBluetooth Framework
+
 ## Why?
 
 These bluetooth cat printers, with model name GB01, GB02 and GT01, have poor support at applications.
@@ -37,6 +44,14 @@ I hate both proprietary and platform-binding things. So I decided to make this.
 
 Thankfully, people here are really warm-hearted, logged their experiences online in a [central repo](https://github.com/JJJollyjim/catprinter), and I am able to walk further 😃
 
+## Trivial
+
+- Many one choose these cat thermal printers because they are cute... or, just cheap 🙃
+
+- Here we tell "**Cat Printer**" because other developers also call the printer as this, but what oversea shops call is "**Kitty Printer**". Search engines, please optimize it 😝
+
+- The official app is protected by law & copyright. I don't know if my work is not good...
+
 ## Developer Note
 
 This application uses server/client model, and have fewest possible dependencies on server side.
diff --git a/README.zh-CN.md b/README.zh-CN.md
index c287758..ac4d368 100644
--- a/README.zh-CN.md
+++ b/README.zh-CN.md
@@ -17,7 +17,7 @@
 
 ## 如何使用
 
-在 Windows 上：
+在 Windows 10 上：
 
 - 获取一份 release，解压，打开 `start.bat`
 - 确保电脑蓝牙开启且猫咪打印机已启动。
@@ -27,6 +27,13 @@
 - 您也可以使用 Windows release，或者依开发者注记准备依赖。
 - 使用 `python3` 打开位于 `printer` 文件夹的 `server.py`。
 
+备注：
+
+- 最新的 Firefox 用户需要手动允许提取画布信息的权限（点击预览后，在地址栏左方）
+- Windows 版本至少为 10 (`10.0.16299`)
+- GNU/Linux 需要 BlueZ (`bluetoothctl`)
+- 可能也兼容有 CoreBluetooth 框架的 Mac (Darwin)
+
 ## 为什么？
 
 这些蓝牙猫咪打印机，型号为 GB01, GB02 和 GT01，没有足够的应用支持。
@@ -37,6 +44,14 @@
 
 幸运的是，这里的热心肠网友将他们的经验记录到了一个[中心仓库](https://github.com/JJJollyjim/catprinter)，因此我可以走得更远 😃
 
+## 花絮
+
+- 很多人选择此种热敏打印机，因为它可爱……或者，只是便宜 🙃
+
+- 其他开发者叫它“猫打印机”（"Cat Printer"），但国外商店叫它“猫咪打印机”（"Kitty Printer"）。在英文文档有差别，提出以优化搜索引擎结果 😝
+
+- 官方 App 受法律、版权、专利保护。不知道此 repo 是否合理……
+
 ## 开发者注记
 
 此 App 使用服务器/客户端模型，且拥有尽可能少的服务端依赖。