Minimize firefox memory size

Follow the below steps to Reduce/Minimize firefox taking huge memory size:
1. Click on the icon on the right top corner of Firefox.
2. Select "Add-Ons"
3. Hit "Plugins".
4. There you can see a list of Plugins used.
5. Just keep the necessary Plugins and make all other Plugins to "Never Activate";status.
6. Finally, restart the Firefox.

Now, you can see the memory usage of firefox, which will be comparatively reduced.