Firefox is today the second most popular desktop browser in the world, because Mozilla continues to improve the app to fit perfectly with what its users want.
In other words, it's not enough for Firefox to simply deliver a solid experience browsing, but also to provide users with a number of additional features that make their lives easier. 
Needless to say, Firefox is a complex browser and this is one of the things that has made it so popular.
Today, we will mention three simple ones tricks which some may know but others will find very useful. Of course, you can share the tricks you already know for a better way of using Firefox on comments at the end of the article.
Mute tabs from the keyboard
Media playing websites are often quite annoying, although the features that are released today allow for blocking of the media.
Ωστόσο, υπάρχουν στιγμές που θέλετε να απενεργοποιήσετε μια καρτέλα (για παράδειγμα το YouTube) που σας ενοχλεί.
You can use it mouse and with one click to stop playback. But this is not the fastest way. Firefox has a shortcut for the same function. Just press the two keys together:
CTRL + M
Press the same shortcut again to turn on the sound.
Search for open tabs
If you're like me, you're using too many tabs at once. Finding a specific tab when running too many is not easy.
But you can search for the tab you are interested in using a dedicated Firefox feature. All you need to do is click the arrow next to the URL and enter the name of the site you are looking for.
Firefox Task Manager
In Windows 10, the task manager is a key tool for identifying applications that slow down your device and use too many resources.
The Firefox browser is accompanied by a similar task manager designed to help diagnose high CPU usage or high memory usage in the browser.
So if you find your browser to be slow or cause unusual CPU usage, you can use this built-in Task Manager to test the effect of each tab and extension on your system performance.
To start Task Manager, just click Menu> More or type it in the address bar below:
about: performance
The UI is quite simple, and will show you a list of all the tabs and add-ons, along with the energy impact and memory usage. You can sort the tabs by either of these two criteria, so it's very easy to determine which of them uses excess memory and slows down your browser.
