1 files changed, 19 insertions, 0 deletions
diff --git a/docs/code-quality/lint/linters/eslint-plugin-mozilla/reject-globalThis-modification.rst b/docs/code-quality/lint/linters/eslint-plugin-mozilla/reject-globalThis-modification.rst
new file mode 100644
index 0000000000..dd4fc4b2af
--- /dev/null
+++ b/docs/code-quality/lint/linters/eslint-plugin-mozilla/reject-globalThis-modification.rst
@@ -0,0 +1,19 @@
+reject-globalThis-modification
+==============================
+
+Reject any modification to ``globalThis`` inside the system modules.
+
+``globalThis`` is the shared global inside the system modules, and modification
+on it is visible from all modules, and it shouldn't be done unless it's really
+necessary.
+
+Examples of incorrect code for this rule:
+-----------------------------------------
+
+.. code-block:: js
+
+    globalThis.foo = 10;
+    Object.defineProperty(globalThis, "bar", { value: 20});
+    ChromeUtils.defineESModuleGetters(globalThis, {
+      AppConstants: "resource://gre/modules/AppConstants.sys.mjs",
+    });