Got it, I’ve run into this exact issue before—here’s how you can switch the Asset Store back to opening inside the Unity Editor instead of your browser:

• For Unity 2020.1 and newer

  1. Open your Unity Editor, go to Edit > Preferences (on Windows) or Unity > Settings (on Mac).
  2. In the left sidebar, select the General category, then click on the External Tools tab.
  3. Look for the Asset Store section—you’ll see a dropdown labeled "Open Asset Store in".
  4. Switch the option from Browser to Unity Editor, then click Apply or Save.

• For older Unity versions (pre-2020.1)

  1. Go to Edit > Preferences (Windows) or Unity > Preferences (Mac).
  2. Find the Asset Store tab directly in the left sidebar.
  3. Uncheck the box that says "Open Asset Store in web browser" (wording might vary slightly by version).
  4. Save the changes, and you’re good to go.

If the setting is missing or not working: #

Sometimes Unity’s preferences can glitch out. Try these fallback methods:

1. Reset Unity’s preferences

   • Close the Unity Editor completely.
   • Delete the Unity preferences file:
     • Windows: %APPDATA%\Unity\Editor\Preferences
     • Mac: ~/Library/Preferences/com.unity3d.UnityEditor.plist
   • Restart Unity—it’ll rebuild the preferences file with default settings, which should revert the Asset Store to open inside the editor.

2. Modify the registry (Windows only)

   • Press Win + R, type regedit, and hit Enter.
   • Navigate to HKEY_CURRENT_USER\Software\Unity Technologies\Unity Editor 5.x (replace 5.x with your Unity version, e.g., 2022.x).
   • Look for a key named AssetStoreUseExternalBrowser—set its value to 0 (0 = open in editor, 1 = open in browser).
   • Close the registry and restart Unity.

Once you’ve done any of these steps, try opening the Asset Store again via Window > Asset Store—it should load right inside the editor now.

内容的提问来源于stack exchange，提问作者Walid El Omari