When it comes to installing the Adobe Acrobat plugin in Firefox, there are a few steps you need to follow. In this article, we will walk you through the process of installing and configuring the plugin.

To start, you'll need to open your terminal and enter the following command: `sudo apt-get install acroread mozilla-acroread acroread-plugins`. This command will download and install the necessary packages for Adobe Acrobat Reader. Once the installation is complete, you can move on to the next step.

After installing the Adobe Acrobat Reader, you'll need to update your source list using the following command: `sudo apt-get update`. This command will ensure that your system has the latest package information.

Once your source list is updated, you can install the Firefox plugin by entering the following command: `sudo apt-get install firefox-adobe-plugin`. This command will download and install the Adobe Acrobat Reader plugin for Firefox.

After installing the plugin, you'll need to configure it to ensure that it is always active when you open a PDF file. To do this, follow these steps:

1. Open your Firefox browser and go to the 'Tools' menu.

2. Select 'Add-ons' from the drop-down menu.

3. In the Add-ons window, click on the 'Plugins' tab.

4. Look for the Adobe Acrobat Reader plugin in the list of available plugins.

5. Click on the plugin to select it, then click on the 'Always Active' button.

By selecting the plug-in and clicking on 'Always Active', you have enabled your plug-in. This means that whenever you open a PDF file, the Adobe Acrobat Reader plugin will be automatically activated.

It's also worth noting that there are three other options available for configuring the Adobe Acrobat Reader plugin:

* 'Never Active': This option ensures that your plugins are never active when you open a PDF on the browser.

* 'Ask to Activate': This command will cause Adobe to ask you if you want to use the plug-ins whenever you open a PDF file.

* 'Always Active': Ensures that your plugin is always active and opens your Adobe reader.

In conclusion, installing the Adobe Acrobat plugin in Firefox is a relatively simple process. By following these steps, you should be able to get started with using Adobe Acrobat Reader in no time.

Install firefox adobe plugin