如何讓 Java 在 chromium 或 firefox 中工作

我更新了 Java（版本 1.8.0_25），現在我似乎無法讓它在 chromium 或 FireFox 中工作。

不再列出 Firefox 和 chromium 的 java 外掛。

改回來（通過 update-alternatives –config ）似乎沒有做任何事情。

Firefox 是 33 版，Chromium 是 34

這是手動安裝java的方法：下載java

step 1: Download java for your system (i.e for 32 bit or 64 bit machine) 
step 2: Open Terminal and go to path where java is downloaded. it may be in downloaded to ~/Downloads. so cd ~/Downloads
step 3: now we will create directory called ‘java’ in /usr.
sudo mkdir /usr/java
step 4: Now we will move ‘jre…tar.gz’ to ‘/usr/java’.
sudo mv <JRE>…tar.gz /usr/java
Go to ‘/usr/java’ directory
cd /usr/java
step 5: We will extract now
sudo tar -zxvf <JRE>…tar.gz

The plugin file for Linux is located here:
32 bit: /usr/java/<JRE>/lib/i386/libnpjp2.so
64 bit: /usr/java/<JRE>/lib/amd64/libnpjp2.so

step 6: Now installing java plugin for mozilla. Create a symbolic link to   the Java Plugin in the Firefox plugins directory.
Open terminal follow these instructions
cd ~/.mozilla
ls To check plugins directory is present or not.
if plugins directory is not created.
mkdir plugins
cd plugins
sudo ln -s /usr/java/<JRE>/lib/<amd64|i386>/libnpjp2.so .
step 7: Restart Firefox Browser.
step 8: Verify java 

引用自：https://unix.stackexchange.com/questions/167617