外掛可在Firefox中根據提示進入Adobe官網下載，

   將下載的檔案提取，可得到libflashplayer.so，將其放入/usr/lib/adobe-flashplugin下。

    但注意Firefox使用的外掛目錄是/usr/lib/firefox-addons/plugins。                                             < sudo mv  libflashplayer.so /usr/lib/adobe-flashplugin >

    檢查一下/usr/lib/firefox-addons/plugins有沒有舊版的libflashplayer.so，是檔案還是連結：<  ls -l /usr/lib/firefox-addons/plugins  >

   <  sudo ln -s /usr/lib/adobe-flashplugin/libflashplayer.so /usr/lib/firefox-addons/plugins  >

   把解壓出來的usr資料夾中的各個檔案複製到檔案系統中的相應位置       < sudo cp XX  /usr/XXX >    P.S: 此過程比較繁瑣，耐心哦~~~

  全部複製完成之後，重啟FireFox。就能正常開啟視訊了~~

一下是官方檔案中的read me    （P.P.S：建議在以後的安裝軟體過程中都好好的把read me.txt讀一遍 ）

    Adobe Systems Incorporated
Flash Player 11 for Linux
Version 11.2.202.460
2015

Adobe recommends that all users upgrade to the latest version of Adobe Flash
Player for the most recent features, bug fixes, and security fixes.  For
more information on the new features in Flash Player 9, please visit
http://www.adobe.com/products/flashplayer/.  For more information on system
requirements, fixed issues, and known issues, see the release notes at
http://www.adobe.com/go/flashplayer_releasenotes.

To confirm which version of Flash Player you have currently installed, see
http://www.adobe.com/software/flash/about/. Users should only install
Players that have been downloaded from trusted sources, such as
http://www.adobe.com/.

Your use of this player is governed by the Adobe End User License Agreement
found at http://www.adobe.com/products/eulas/players/flash/.


Privacy
-------

Adobe is committed to preserving the privacy of end users. For more
information on configuring Client-side privacy visit the Settings Manager
Documentation: http://www.adobe.com/go/flashplayerhelp.


Installation instructions
-------------------------

Installing using the plugin tar.gz:
    o Unpack the plugin tar.gz and copy the files to the appropriate location.
    o Save the plugin tar.gz locally and note the location the file was saved to.
    o Launch terminal and change directories to the location the file was saved to.

    o Unpack the tar.gz file.  Once unpacked you will see the following:
        + libflashplayer.so
        + /usr
    o Identify the location of the browser plugins directory, based on your Linux distribution and Firefox version
    o Copy libflashplayer.so to the appropriate browser plugins directory.  At the prompt type:
        + cp libflashlayer.so <BrowserPluginsLocation>
    o Copy the Flash Player Local Settings configurations files to the /usr directory.  At the prompt type:
        + sudo cp -r usr/* /usr
 
    
    Installing the plugin using RPM:
       o As root, enter in terminal:
          + # rpm -Uvh <rpm_package_file>
          + Click Enter key and follow prompts

Installing the standalone player:
   o Unpack the tar.gz file
   o To execute the standalone player,
          + Double-click, or
          + Enter in terminal: ./flashplayer


Uninstallation instructions
---------------------------

Manual uninstallation (for users who installed the plugin via Install script):
   o Delete libflashplayer.so binary and flashplayer.xpt file in
   directory /home/<user>/.mozilla/plugins/

RPM uninstallation:
   o As root, enter in terminal:
          + # rpm -e flash-plugin
          + Click Enter key and follow prompts


Technical Issues and Reporting Bugs
-----------------------------------
 
The Adobe Flash Player Support Center at
http://www.adobe.com/support/flashplayer/ is a free online resource for
support and troubleshooting information. Bug reports may be submitted at
http://www.adobe.com/go/wish. To allow us to investigate reported bugs,
please include the following information:
 
1) Platform and version
2) Browser version
3) Reproducible steps including a URL to the web site where the problem
   was encountered.
 
If we need further information about a bug, you will be contacted. An
automated reply will be sent to assure you that we have received your
bug report. Due to the volume of mail received, we are not able to
individually respond to each report.

Use the following commands to generate dependency lists for Flash Player or the Local Setting Manager:
 
Flash Player:
ldd <BrowserPluginsLocation>/libflashplayer.so
 
Gnome Local Setting Manager:
ldd /usr/lib/kcm_adobe_flash_player.so (for 32-bit systems)
ldd /usr/lib64/kcm_adobe_flash_player.so (for 64-bit systems)
 
KDE Local Settings Manager:
ldd /usr/bin/flash-player-properties


Legal
-----

Adobe(R) Flash(R) Player. Copyright (C) 1996 - 2015 Adobe Systems
Incorporated. All Rights Reserved. Adobe and Flash  are either
trademarks or registered trademarks in the United States and/or
other countries.