Update README.md

README.md

@@ -20,3 +20,37 @@ curl https://raw.githubusercontent.com/oae/gnome-shell-extensions-sync/master/in
 2. Create a new token from [here](https://github.com/settings/tokens/new). Only gist permission is needed since we edit the gists.
 3. Open extension settings and fill gist id from first step and gist token from second step.
 4. Enjoy!
+
+## Notes
+
+* Downloading from gist will do 3 things.
+ - It will remove all extensions that are not exist in the gist.
+ - It will install extensions that are listed in gist and update their settings.
+ - It will update all the settings of installed the extensions.
+
+* Uploading to gist will dump all the settings of the installed extensions(enabled/disabled) and put them in the gist with the below structure
+```json
+{
+ "description": "Extensions sync",
+ "files": {
+ "syncSettings": {
+ "content": {
+ "lastUpdatedAt": "time",
+ }
+ },
+ "extensions": {
+ "content": {
+ "extension1": {
+ "schema1": "schema1 settings",
+ "schema2": "schema2 settings",
+ },
+ "extension2": {
+ "schema1": "schema1 settings",
+ "schema2": "schema2 settings",
+ },
+ }
+ }
+ }
+}
+```
+