Updating add-ons for a new application version of MOzilla fire fox

 Mozilla add-ons is an application you can take from mozilla to  upgrade the perform of mozilla untility.
1.Click on your mozzila beowser tool tab, find add ons
2. they will shown like this:

[edit]

Get Add ons, is the list new add ons, you can choice with click and put the add ons on your mozilla browser utility, like translator, picture editor etc
Extensions, is the list that add ons have been installed on your computer , if you don't use or like the add ons you can dissable or maybe uninstal
Themes, in themes tab, you can  changes you mozilla fire fox image background(click get themes,choice what themes you like)
Pluggins,is the list all your add ons mozilla firefox, if your mozilla running too slow because there is many add ons you can disable them first ,and make it able after the mozila firefox  open the browser finished