How to "fix" the work of the "go back" button?

Question

Android

Hello!
I am developing a small application on android and I am facing the following problems:
First of all I am providing the code that I am using to implement the "go back" button on android

Android Manifest

<activity
            android:name=".FavoriteActivity"
            android:label="@string/title_activity_favorite"
            android:parentActivityName=".MainActivity"
            android:theme="@style/AppTheme.NoActionBar">
            <meta-data
                android:name="android.support.PARENT_ACTIVITY"
                android:value="info.md7.dermanlar.MainActivity" />
        </activity>

Activity

getSupportActionBar().setDisplayHomeAsUpEnabled(true);

1) When I click on the RecyclerView (MainActivity) element using Parcelable, I pass the texts to the next InfoActivity and there is a button on click that opens the WebView and displays the table. If I add a "go back" button to the InfoActivity on the WebView, then I get an error, since this activity is already empty.
2) There are 2 activities - FavoriteActivity & MainActivity when clicking on the elements of which InfoActivity opens (+ texts using parcelable). How to return back depending on which activity the transition was from? Now I have no matter which activity he moved from, the return button will always return to MainActivity,