ヅラッシュ！ by NI-Lab.

Adobe - Adobe Flash Player に Linux 上の Mozilla 系ブラウザでアクセスすると、

.tar.gz installation

1. Click the "Download .tar.gz" link. A dialog box will appear asking you where to save the file.
2. Save the .tar.gz file to your desktop and wait for the file to download completely.
3. Unpackage the file. A directory called install_flash_player_9_linux will be created.
4. In terminal, navigate to this directory and type ./flashplayer-installer to run the installer. Click Enter. The installer will instruct you to shut down your browser(s).
5. Once the installation is complete, the plug-in will be installed in your Mozilla browser. To verify, launch Mozilla and choose Help > About Plug-ins from the browser menu.

Adobe - Adobe Flash Player

って説明が出るのでその通りにインストール。
今回は Mozilla Firefox 1.0.4 on Debian GNU/Linux Sarge 起動したままでインストールしたけど、ブラウザの再起動も不要だった。

# wget http://fpdownload.macromedia.com/get/flashplayer/current/install_flash_player_9_linux.tar.gz
# tar zxf ./install_flash_player_9_linux.tar.gz
# cd ./install_flash_player_9_linux
# ./flashplayer-installer

flashplayer-installer を実行すると、ブラウザをインストールしたディレクトリの場所をたずねてくるので /usr/lib/mozilla-firefox を回答。

Please enter the installation path of the Mozilla, SeaMonkey,
or Firefox browser (i.e., /usr/lib/mozilla): /usr/lib/mozilla-firefox
dir= /usr/lib/mozilla-firefox
 
 
----------- Install Action Summary -----------
 
Adobe Flash Player 9 will be installed in the following directory:
 
Browser installation directory = /usr/lib/mozilla-firefox
 
Proceed with the installation? (y/n/q): y
 
Installation complete.