diff --git a/.gitignore b/.gitignore
index ec38d01cc84b..4077e168f79c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -39,3 +39,9 @@ js/src/tests/results-*.txt
 # Java HTML5 parser classes
 parser/html/java/htmlparser/
 parser/html/java/javaparser/
+
+# Ignore the files and directory that Eclipse IDE creates
+/.project
+/.cproject
+/.settings/
+
diff --git a/.hgignore b/.hgignore
index 2c80192f3dea..eaeee62b5d8d 100644
--- a/.hgignore
+++ b/.hgignore
@@ -39,3 +39,9 @@ _OPT\.OBJ/
 
 # SVN directories
 \.svn/
+
+# Ignore the files and directory that Eclipse IDE creates
+^\.project$
+^\.cproject$
+^\.settings$
+