Chromium – How to Install Windows Media Player Plugin

Rhythmbox is not a canonical product so I don't think canonical can do anything about it. If you need a feature may be you can request feature to rhythmbox developers. If you are talking about third party plugin called 10 Band Equalizer.

What you can do is create a folder called plugins in $HOME/.local/share/rhythmbox and download the plugin and extract the equalizer folder in the plugins folder you created.

OR

If you know how to use git and have git installed. Just goto $HOME/.local/share/rhythmbox and do:

git clone https://github.com/luqmana/rhythmbox-plugins.git plugins

and then you can update your plugin with git pull command from plugins directory

Then enable the plugin from rhythmbox.

It can also be installed via a PPA as described in the linked question.

Linked Question: - How do I install third-party rhythmbox plugins?

This plugin is written for Python 2, but since gedit 3.8, only Python 3 plugins are supported. So some small changes are required.

1. Modify the installer (gedit-markdown.sh) to install the python3 markdown module:

   This is a patch that you can apply on the existing file (or you can just copy the full modified version available here):

   --- gedit-markdown_ori.sh   2014-05-14 16:14:58.386700310 +0200
   +++ gedit-markdown.sh   2014-05-14 15:42:21.038783248 +0200
   @@ -263,7 +263,9 @@
   
    # Note: sous Archlinux, «/usr/bin/python» correspond à Python 3. On teste donc les
    # chemins pour Python 2 en premier.
   -if type -p python2.7 > /dev/null; then
   +if type -p python3 > /dev/null; then
   +   binPython=$(type -p python3)
   +elif type -p python2.7 > /dev/null; then
       binPython=$(type -p python2.7)
    elif type -p python2.6 > /dev/null; then
       binPython=$(type -p python2.6)
   @@ -287,15 +289,15 @@
               cheminPythonMarkdown=python-markdown/python2
               cheminPythonSitePackages=$("$binPython" -m site --user-site)
           fi
   -#  elif [[ ${versionPython:0:1} == 3 ]]; then
   -#      compareVersions "$versionPython" "3.1"
   -#      
   -#      if [[ $? == 2 ]]; then
   -#          bonneVersionPython=false
   -#      else
   -#          cheminPythonMarkdown=python-markdown/python3
   -#          cheminPythonSitePackages=$("$binPython" -m site --user-site)
   -#      fi
   +   elif [[ ${versionPython:0:1} == 3 ]]; then
   +       compareVersions "$versionPython" "3.1"
   +       
   +       if [[ $? == 2 ]]; then
   +           bonneVersionPython=false
   +       else
   +           cheminPythonMarkdown=python-markdown/python3
   +           cheminPythonSitePackages=$("$binPython" -m site --user-site)
   +       fi
       else
           bonneVersionPython=false
       fi
   

2. Run ./gedit-markdown.sh install

   You should see python 3.4 instead of 2.7:

   ############################################################
   ##
   ## Installation of gedit-markdown
   ##
   ############################################################
   
   ## First step: check dependencies
   
   - gedit: 3.10.4
   - Python: 3.4
   
   [...]
   

3. Change the plugin loader to python3

   Replace /home/aarold/.local/share/gedit/plugins/markdown-preview.plugin with:

   [Plugin]
   Loader=python3
   Module=markdown-preview
   IAge=3
   Name=Markdown Preview
   Name[fr]=Aperçu Markdown
   Description=Show the HTML version of the Markdown text you're editing
   Description[fr]=Affiche l'aperçu en HTML du document Markdown en cours d'édition
   Authors=Michele Campeotto <micampe@micampe.it>\nJean-Philippe Fleury <contact@jpfleury.net>
   Copyright=Copyright © 2005, 2006 Michele Campeotto\nCopyright © 2009, 2011-2012 Jean-Philippe Fleury
   Website=http://www.jpfleury.net/logiciels/gedit-markdown.php
   

4. Convert /home/aarold/.local/share/gedit/plugins/markdown-preview/__init__.py to python3:

   Run:

   2to3 -w /home/aarold/.local/share/gedit/plugins/markdown-preview/__init__.py
   

   Finally open this file and edit line 86 (remove the binary mode, "wb" -> "w"):

   with open(confFile, "w") as confFile:
   

5. Activate the plugin in Gedit as you did.