Made inner classes static to discourage access within of enclosing class

app/src/main/java/acr/browser/lightning/activity/BrowserActivity.java

@@ -1930,7 +1930,7 @@ public abstract class BrowserActivity extends ThemableBrowserActivity implements
     /**
      * a class extending FramLayout used to display fullscreen videos
      */
-    private class FullscreenHolder extends FrameLayout {
+    private static class FullscreenHolder extends FrameLayout {
 
         public FullscreenHolder(Context ctx) {
             super(ctx);

app/src/main/java/acr/browser/lightning/fragment/BookmarkSettingsFragment.java

@@ -114,7 +114,7 @@ public class BookmarkSettingsFragment extends PreferenceFragment implements Pref
         }
     }
 
-    private class SortName implements Comparator<File> {
+    private static class SortName implements Comparator<File> {
 
         @Override
         public int compare(File a, File b) {

app/src/main/java/acr/browser/lightning/object/SearchAdapter.java

@@ -108,7 +108,7 @@ public class SearchAdapter extends BaseAdapter implements Filterable {
         }
     }
 
-    private class NameFilter implements FilenameFilter {
+    private static class NameFilter implements FilenameFilter {
 
         @Override
         public boolean accept(File dir, String filename) {
@@ -273,7 +273,7 @@ public class SearchAdapter extends BaseAdapter implements Filterable {
 
     }
 
-    private class SuggestionHolder {
+    private static class SuggestionHolder {
         ImageView mImage;
         TextView mTitle;
         TextView mUrl;

app/src/main/java/acr/browser/lightning/reading/ArticleTextExtractor.java

@@ -1208,7 +1208,7 @@ public class ArticleTextExtractor {
      *
      * @author Chris Alexander, chris@chris-alexander.co.uk
      */
-    private class ImageComparator implements Comparator<ImageResult> {
+    private static class ImageComparator implements Comparator<ImageResult> {
 
         @Override
         public int compare(ImageResult o1, ImageResult o2) {