--- a/dom/canvas/WebGLContext.cpp
+++ b/dom/canvas/WebGLContext.cpp
@@ -2357,17 +2357,18 @@ ZeroTextureData(WebGLContext* webgl, con
 
         return true;
     }
 
     const auto driverUnpackInfo = usage->idealUnpack;
     MOZ_RELEASE_ASSERT(driverUnpackInfo, "GFX: ideal unpack info not set.");
 
     if (usage->IsRenderable() && depth == 1 &&
-        !xOffset && !yOffset && !zOffset)
+        !xOffset && !yOffset && !zOffset &&
+        target != LOCAL_GL_TEXTURE_2D_ARRAY)
     {
         // While we would like to skip the extra complexity of trying to zero with an FB
         // clear, ANGLE_depth_texture requires this.
         do {
             if (ZeroTexImageWithClear(webgl, gl, target, tex, level, usage, width,
                                       height))
             {
                 return true;