diff --git a/examples/graph_viewer/viewer_common.ml b/examples/graph_viewer/viewer_common.ml
index 74b9b55fae..5b347182d1 100644
--- a/examples/graph_viewer/viewer_common.ml
+++ b/examples/graph_viewer/viewer_common.ml
@@ -252,7 +252,7 @@ Format.eprintf "REDRAW %d %d %d %d@." x' y' w h;
     let dx = pm.valid_rect.x - x0 in
     let dy = pm.valid_rect.y - y0 in
     (*
-Firebug.console##log_6 (dx, pm.valid_rect.width, a.width,
+Console.console##log_6 (dx, pm.valid_rect.width, a.width,
                dy, pm.valid_rect.height, a.height);
 *)
     if
diff --git a/examples/graph_viewer/viewer_js.ml b/examples/graph_viewer/viewer_js.ml
index 2820bd543e..2fb6afed3d 100644
--- a/examples/graph_viewer/viewer_js.ml
+++ b/examples/graph_viewer/viewer_js.ml
@@ -304,18 +304,18 @@ let start () =
     if not !started then p##.style##.display := Js.string "inline";
     Lwt.return ());
   (*
-  Firebug.console##time(Js.string "loading");
+  Console.console##time(Js.string "loading");
 *)
   getfile "scene.json"
   >>= fun s ->
   (*
-  Firebug.console##timeEnd(Js.string "loading");
-  Firebug.console##time(Js.string "parsing");
+  Console.console##timeEnd(Js.string "loading");
+  Console.console##time(Js.string "parsing");
 *)
   let (x1, y1, x2, y2), bboxes, scene = of_json ~typ:[%json: scene] s in
   (*
-  Firebug.console##timeEnd(Js.string "parsing");
-  Firebug.console##time(Js.string "init");
+  Console.console##timeEnd(Js.string "parsing");
+  Console.console##time(Js.string "init");
 *)
   started := true;
   Dom.removeChild doc##.body p;
@@ -350,7 +350,7 @@ let start () =
   let redraw_queued = ref false in
   let update_view _force =
     (*
-Firebug.console##log_2(Js.string "update", Js.date##now());
+Console.console##log_2(Js.string "update", Js.date##now());
 *)
     let a = allocation () in
     let scale = get_scale () in
@@ -389,7 +389,7 @@ Firebug.console##log_2(Js.string "update", Js.date##now());
     if not !redraw_queued then
       ignore (redraw_queued := true;
 (*
-Firebug.console##log(Js.string "sleep");
+Console.console##log(Js.string "sleep");
 *)
               Lwt_js.yield() >>= fun () ->
               redraw_queued := false;
@@ -502,7 +502,7 @@ Firebug.console##log(Js.string "sleep");
   (*
   Html.addEventListener Html.document Html.Event.keydown
     (Html.handler
-       (fun e -> Firebug.console##log(e##keyCode);
+       (fun e -> Console.console##log(e##keyCode);
          Js._true))
     Js._true;
 *)
@@ -510,7 +510,7 @@ Firebug.console##log(Js.string "sleep");
   Html.addEventListener Html.document Html.Event.keypress
     (Html.handler
        (fun e ->
-             Firebug.console##log(Js.string "press");
+             Console.console##log(Js.string "press");
          match e##keyCode with
          | 37 -> (* left *)
              Js._false
@@ -521,7 +521,7 @@ Firebug.console##log(Js.string "sleep");
          | 40 -> (* down *)
              Js._false
          | _ ->
-             Firebug.console##log(- 1- e##keyCode);
+             Console.console##log(- 1- e##keyCode);
              Js._true))
     Js._true;
 *)
@@ -549,7 +549,7 @@ Firebug.console##log(Js.string "sleep");
         Js._false
     | _ ->
         (*
-        Firebug.console##log_2(Js.string "keycode:", ev##keyCode);
+        Console.console##log_2(Js.string "keycode:", ev##keyCode);
 *)
         Js._true
   in
@@ -564,12 +564,12 @@ Firebug.console##log(Js.string "sleep");
         ignored_keycode := -1;
         if e##.keyCode = k then Js._true else handle_key_event e);
   (*
-Firebug.console##time(Js.string "initial drawing");
+Console.console##time(Js.string "initial drawing");
 *)
   update_view true;
   (*
-Firebug.console##timeEnd(Js.string "initial drawing");
-Firebug.console##timeEnd(Js.string "init");
+Console.console##timeEnd(Js.string "initial drawing");
+Console.console##timeEnd(Js.string "init");
 *)
   Lwt.return ()
 
diff --git a/examples/hyperbolic/hypertree.ml b/examples/hyperbolic/hypertree.ml
index a4f2dda066..cbfc1a14e2 100644
--- a/examples/hyperbolic/hypertree.ml
+++ b/examples/hyperbolic/hypertree.ml
@@ -547,7 +547,7 @@ let language =
        (Html.window##.localStorage##getItem (Js.string "hyp_lang"))
        default_language)
 
-let _ = Firebug.console##log !language
+let _ = Console.console##log !language
 
 let set_language lang =
   Html.window##.localStorage##setItem (Js.string "hyp_lang") lang;
@@ -643,7 +643,7 @@ type boxes =
 let shadow = false
 
 let draw canvas vertices edges nodes boxes =
-  Firebug.console##time (Js.string "draw");
+  Console.console##time (Js.string "draw");
   let c = canvas##getContext Html._2d_ in
   let ((rx, ry, dx, dy) as transf) = screen_transform canvas in
   c##clearRect
@@ -795,8 +795,8 @@ let draw canvas vertices edges nodes boxes =
           (Js.float (2. *. h))
     | `Txt (_, None, _) | `None -> ()
   done;
-  Firebug.console##timeEnd (Js.string "draw");
-  Firebug.console##log_2 !image_count !large_image_count
+  Console.console##timeEnd (Js.string "draw");
+  Console.console##log_2 !image_count !large_image_count
 
 let tree_url = "tree.json"
 
@@ -1239,7 +1239,7 @@ let show_image all_messages image_info name small_image =
   if !i >= 0
   then (
     let info = image_info.(!i) in
-    Firebug.console##log_2 name !i;
+    Console.console##log_2 name !i;
     let d = Html.document in
     let container = Html.createDiv d in
     container##.style##.margin := Js.string "10px";
@@ -1582,7 +1582,7 @@ let start _ =
     (redraw_funct :=
        fun () ->
          need_redraw := false;
-         Firebug.console##time (Js.string "transform");
+         Console.console##time (Js.string "transform");
          (*
           let transf = hyp_transf !tr' in
           for i = 0 to Array.length vertices - 1 do
@@ -1596,7 +1596,7 @@ let start _ =
            canvas##.width := w;
            canvas##.height := h);
          hyp_transf_vect !tr' vertices vertices';
-         Firebug.console##timeEnd (Js.string "transform");
+         Console.console##timeEnd (Js.string "transform");
          draw canvas vertices' edges nodes boxes);
     perform_redraw ();
     Html.window##.onresize :=
@@ -1692,7 +1692,7 @@ debug_msg (Format.sprintf "Resize %d %d" w h);
     handle_touch_events
       canvas
       (fun x0 y0 x1 y1 ->
-        Firebug.console##time (Js.string "transform");
+        Console.console##time (Js.string "transform");
         let z0 = from_screen canvas x0 y0 in
         let z1 = from_screen canvas x1 y1 in
         (*
diff --git a/examples/test_wheel/test_wheel.ml b/examples/test_wheel/test_wheel.ml
index 209585bf22..2da2588c0b 100644
--- a/examples/test_wheel/test_wheel.ml
+++ b/examples/test_wheel/test_wheel.ml
@@ -13,7 +13,7 @@ let () =
   in
   html##.onwheel :=
     Dom.handler (fun (event : Dom_html.mousewheelEvent Js.t) ->
-        Firebug.console##debug event;
+        Console.console##debug event;
         let deltaX = event##.deltaX in
         let deltaY = event##.deltaY in
         let deltaZ = event##.deltaZ in
diff --git a/examples/webgl/webgldemo.ml b/examples/webgl/webgldemo.ml
index 082b6be798..1dc7b4840d 100644
--- a/examples/webgl/webgldemo.ml
+++ b/examples/webgl/webgldemo.ml
@@ -24,11 +24,11 @@ open Js
 let error f =
   Printf.ksprintf
     (fun s ->
-      Firebug.console##error (Js.string s);
+      Console.console##error (Js.string s);
       failwith s)
     f
 
-let debug f = Printf.ksprintf (fun s -> Firebug.console##log (Js.string s)) f
+let debug f = Printf.ksprintf (fun s -> Console.console##log (Js.string s)) f
 
 let alert f =
   Printf.ksprintf
diff --git a/lib/js_of_ocaml/firebug.ml b/lib/js_of_ocaml/console.ml
similarity index 100%
rename from lib/js_of_ocaml/firebug.ml
rename to lib/js_of_ocaml/console.ml
diff --git a/lib/js_of_ocaml/firebug.mli b/lib/js_of_ocaml/console.mli
similarity index 98%
rename from lib/js_of_ocaml/firebug.mli
rename to lib/js_of_ocaml/console.mli
index fdf94f9f9f..458e3ef601 100644
--- a/lib/js_of_ocaml/firebug.mli
+++ b/lib/js_of_ocaml/console.mli
@@ -18,9 +18,9 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  *)
 
-(** Firebug API (debugging console).
+(** Console API (debugging console).
 
-The Firebug console API
+The console API
 *)
 
 open Js
diff --git a/lib/js_of_ocaml/geolocation.mli b/lib/js_of_ocaml/geolocation.mli
index 3b562d3e25..d11ca9ef97 100644
--- a/lib/js_of_ocaml/geolocation.mli
+++ b/lib/js_of_ocaml/geolocation.mli
@@ -28,12 +28,12 @@
     let f_success pos =
       let coords = pos##.coords in
       let latitude = coords##.latitude in
-      Firebug.console##debug latitude ;
+      Console.console##debug latitude ;
     in
     let f_error err =
       let code = err##.code in
       let msg = err##.message in
-      if code = err##._TIMEOUT then Firebug.console##debug(msg)
+      if code = err##._TIMEOUT then Console.console##debug(msg)
     in
     geo##getCurrentPosition (Js.wrap_callback f_success) (Js.wrap_callback f_error) options
   ]}
diff --git a/lib/js_of_ocaml/intl.mli b/lib/js_of_ocaml/intl.mli
index 3cbf2ad281..0ee7d28b46 100644
--- a/lib/js_of_ocaml/intl.mli
+++ b/lib/js_of_ocaml/intl.mli
@@ -24,7 +24,7 @@
 
 open Js ;;
 
-let fc v = Firebug.console##debug v in
+let fc v = Console.console##debug v in
 
 let jas a = array(Array.map (fun v -> string v) a) in
 
@@ -410,10 +410,10 @@ if (Intl.is_supported()) then (
     ) ;
 
   with
-  | Error err -> Firebug.console##debug (
+  | Error err -> Console.console##debug (
       string (string_of_error err)) ;
 ) else (
-  Firebug.console##debug (string "Intl is not supported!") ;
+  Console.console##debug (string "Intl is not supported!") ;
 )
 
     ]}
diff --git a/lib/js_of_ocaml/js_of_ocaml.ml b/lib/js_of_ocaml/js_of_ocaml.ml
index a0cdd5f30e..6f1683ffd8 100644
--- a/lib/js_of_ocaml/js_of_ocaml.ml
+++ b/lib/js_of_ocaml/js_of_ocaml.ml
@@ -18,6 +18,7 @@
  *)
 
 module CSS = CSS
+module Console = Console
 module Dom = Dom
 module Dom_events = Dom_events
 module Dom_html = Dom_html
@@ -25,7 +26,8 @@ module Dom_svg = Dom_svg
 module Effect_js = Effect_js
 module EventSource = EventSource
 module File = File
-module Firebug = Firebug
+module Firebug = Console
+[@@ocaml.deprecated "[since 6.0] Use Js_of_ocaml.Console instead."]
 module Form = Form
 module Geolocation = Geolocation
 module IntersectionObserver = IntersectionObserver
diff --git a/lib/js_of_ocaml/mutationObserver.mli b/lib/js_of_ocaml/mutationObserver.mli
index edc9b4ac6e..1376326d03 100644
--- a/lib/js_of_ocaml/mutationObserver.mli
+++ b/lib/js_of_ocaml/mutationObserver.mli
@@ -29,8 +29,8 @@
       in
       let node = (target :> Dom.node Js.t) in
       let f records observer =
-        Firebug.console##debug records ;
-        Firebug.console##debug observer
+        Console.console##debug records ;
+        Console.console##debug observer
       in
       MutationObserver.observe ~node ~f
         ~attributes:true ~child_list:true ~character_data:true
diff --git a/lib/js_of_ocaml/performanceObserver.mli b/lib/js_of_ocaml/performanceObserver.mli
index c0a073b8a2..12f25b3b05 100644
--- a/lib/js_of_ocaml/performanceObserver.mli
+++ b/lib/js_of_ocaml/performanceObserver.mli
@@ -25,8 +25,8 @@
         let entry_types = [ "measure" ] in
         let f entries observer =
           let entries = entries##getEntries in
-          Firebug.console##debug entries ;
-          Firebug.console##debug observer
+          Console.console##debug entries ;
+          Console.console##debug observer
         in
         PerformanceObserver.observe ~entry_types ~f
         ()
diff --git a/lib/js_of_ocaml/resizeObserver.mli b/lib/js_of_ocaml/resizeObserver.mli
index df6874437e..defe18ed07 100644
--- a/lib/js_of_ocaml/resizeObserver.mli
+++ b/lib/js_of_ocaml/resizeObserver.mli
@@ -29,8 +29,8 @@
         in
         let node = (target :> Dom.node Js.t) in
         let f entries observer =
-          Firebug.console##debug entries;
-          Firebug.console##debug observer
+          Console.console##debug entries;
+          Console.console##debug observer
         in
         ResizeObserver.observe ~node ~f
           ~box:(Js.string "content-box")
diff --git a/lib/lwt/log/lwt_log_js.ml b/lib/lwt/log/lwt_log_js.ml
index 967ab14865..eafcdfa8cc 100644
--- a/lib/lwt/log/lwt_log_js.ml
+++ b/lib/lwt/log/lwt_log_js.ml
@@ -32,14 +32,14 @@ let console =
           (Printf.sprintf "[%s] %s" (Section.name section) (String.concat "\n" logs))
       in
       (match level, Lwt.get js_val with
-      | Debug, None -> Firebug.console##debug str
-      | Debug, Some v -> Firebug.console##debug_2 str v
-      | Info, None | Notice, None -> Firebug.console##info str
-      | Info, Some v | Notice, Some v -> Firebug.console##info_2 str v
-      | Warning, None -> Firebug.console##warn str
-      | Warning, Some v -> Firebug.console##warn_2 str v
-      | Error, None | Fatal, None -> Firebug.console##error str
-      | Error, Some v | Fatal, Some v -> Firebug.console##error_2 str v);
+      | Debug, None -> Console.console##debug str
+      | Debug, Some v -> Console.console##debug_2 str v
+      | Info, None | Notice, None -> Console.console##info str
+      | Info, Some v | Notice, Some v -> Console.console##info_2 str v
+      | Warning, None -> Console.console##warn str
+      | Warning, Some v -> Console.console##warn_2 str v
+      | Error, None | Fatal, None -> Console.console##error str
+      | Error, Some v | Fatal, Some v -> Console.console##error_2 str v);
       Lwt.return_unit)
 
 let log ?inspect ?exn ?section ?location ?logger ~level message =
diff --git a/lib/lwt/lwt_js.ml b/lib/lwt/lwt_js.ml
index e76708bbd0..25eedf686c 100644
--- a/lib/lwt/lwt_js.ml
+++ b/lib/lwt/lwt_js.ml
@@ -37,7 +37,7 @@ let wakeup = function
 
 let () = Lwt.register_pause_notifier wakeup
 
-let prerr_string s = Firebug.console##log (Js.string s)
+let prerr_string s = Console.console##log (Js.string s)
 
 let _ =
   Lwt.async_exception_hook :=
diff --git a/lib/lwt/lwt_js_events.ml b/lib/lwt/lwt_js_events.ml
index ae00986df2..6dc75e69c4 100644
--- a/lib/lwt/lwt_js_events.ml
+++ b/lib/lwt/lwt_js_events.ml
@@ -61,7 +61,7 @@ let with_error_log f x =
   Lwt.catch
     (fun () -> f x)
     (fun e ->
-      Firebug.console##log (Js.string (Printexc.to_string e));
+      Console.console##log (Js.string (Printexc.to_string e));
       Lwt.return ())
 
 let seq_loop evh ?(cancel_handler = false) ?use_capture ?passive target handler =
@@ -330,7 +330,7 @@ let mousewheel ?use_capture ?passive target =
          ?passive:(opt_map Js.bool passive)
          target
          (fun (ev : #Dom_html.event Js.t) ~dx ~dy ->
-           Firebug.console##log ev;
+           Console.console##log ev;
            cancel ();
            Lwt.wakeup w (ev, (dx, dy));
            Js.bool true)
diff --git a/lib/lwt/lwt_jsonp.ml b/lib/lwt/lwt_jsonp.ml
index 6e621009e0..31d6a5c9be 100644
--- a/lib/lwt/lwt_jsonp.ml
+++ b/lib/lwt/lwt_jsonp.ml
@@ -59,7 +59,7 @@ let raw_call name uri error_cb user_cb =
             if !executed
             then Lwt.return_unit
             else (
-              Firebug.console##warn
+              Console.console##warn
                 (Js.string "Jsonp: script loaded but callback not executed");
               finalize ();
               error_cb x;
diff --git a/toplevel/examples/lwt_toplevel/toplevel.ml b/toplevel/examples/lwt_toplevel/toplevel.ml
index 614a9b3071..fc201a8947 100644
--- a/toplevel/examples/lwt_toplevel/toplevel.ml
+++ b/toplevel/examples/lwt_toplevel/toplevel.ml
@@ -442,7 +442,7 @@ let run _ =
        match exc with
        | Js_error.Exn e ->
            let e = Js_error.to_error e in
-           Firebug.console##log e##.stack
+           Console.console##log e##.stack
        | _ -> ());
   Lwt.async (fun () ->
       resize ~container ~textbox ()
@@ -477,7 +477,7 @@ let run _ =
   with
   | Not_found -> ()
   | exc ->
-      Firebug.console##log_3
+      Console.console##log_3
         (Js.string "exception")
         (Js.string (Printexc.to_string exc))
         exc