Index: includes/blockads-firefox.md
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+**Firefox**
+
+1. Click the **Firefox menu icon** in the upper right corner of the toolbar and select **Add-ons**.
+
The *Add-ons Manager* tab opens.
+2. Select **Extensions** from the left menu.
+3. Select Adblock Plus and click **Options** (Windows) / **Preferences** (Mac).
+4. Click **Filter preferences**.
+
The *Adblock Plus Filter preferences* window opens.
+5. Uncheck the box labeled **Allow some nonintrusive advertising**.
+6. Click **Close**.