manually install gnome extensions step by step

With the usefulness and interesting functions of gnome extensions be, although it is so easy to install or uninstall an extensions through extensions.gnome.org, actually this problem puzzled me for a very long time that how to install or delete gnome extension manually.
Today I spared a lot of time on this things, and I finally to figure that!
with no any assistance from javascript of extensions.gnome.org you have to do it yourself, let’s do this:

choose a extensions

browse extensions from extensions.gnome.org, and in this time, let’s say the netspeed
and now we can not use the buttons aside this extensions to install, then have you notice the Extension Homepage which indicat this extensions is from github.

clone extension to local

browse into this github site and simply git clone it
git@github.com:hedayaty/NetSpeed.git
and now we can see a folder named NetSpeed cloned just from this github

rename extensions name

cd into this folder and open metadata.json, find the key named uuid, in this time the value is netspeed@hedayaty.gmail.com
then just rename the root folder NetSpeed into netspeed@hedayaty.gmail.com

deploy into gnome-shell

after the procedure above, just copy the whole folder into ~/.local/share/gnome-shell/extensions
But there will have no any changes, you need to restart the gnome-shell
press ALT F2 to call the gnome-shell command window up, and input r which represent restart and press enter
after a little bit of time, your gnome-shell restart progress is finished.

enable your extensions

this time is easy to do with that, just use gnome-shell-extensions-pref or gnome-tweak-tool to enable that extension.
Enjoy your gnome-extensions!!!

version confliction

sometimes there will be a miss match of version that used in gnome-shell. For instance with gnome-shell version 3.8 but NetSpeed version 3.10.
So you need to revert the version of NetSpeed code, is that possible? of course it is git
first you need to see what version you can revert and properly can with git log
in this time I found the 1f17b3ce08c40f347e5659bcd8d01ddf79381de2 version is just fit for my need, then I use
git reset --hard 1f17b3ce08c40f347e5659bcd8d01ddf79381de2
for detailed introduction of git reset .
so as to revert the version, and now I could use that extensions.
just repeat the procedures above untill all your extensions were installed.
Never forget to full copy with all your extensions after successfully installed, it is a tought assignment!