diff --git a/components/config/opts.rs b/components/config/opts.rs
index 2970ce57bcd..3140e903522 100644
--- a/components/config/opts.rs
+++ b/components/config/opts.rs
@@ -86,10 +86,6 @@ pub struct Opts {
     /// browser engines.
     pub bubble_inline_sizes_separately: bool,
 
-    /// True if we should show borders on all layers and tiles for
-    /// debugging purposes (`--show-debug-borders`).
-    pub show_debug_borders: bool,
-
     /// True if we should show borders on all fragments for debugging purposes
     /// (`--show-debug-fragment-borders`).
     pub show_debug_fragment_borders: bool,
@@ -285,9 +281,6 @@ pub struct DebugOptions {
     /// Enable all heartbeats for profiling.
     pub profile_heartbeats: bool,
 
-    /// Paint borders along layer and tile boundaries.
-    pub show_compositor_borders: bool,
-
     /// Paint borders along fragment boundaries.
     pub show_fragment_borders: bool,
 
@@ -369,7 +362,6 @@ impl DebugOptions {
                 "relayout-event" => self.relayout_event = true,
                 "profile-script-events" => self.profile_script_events = true,
                 "profile-heartbeats" => self.profile_heartbeats = true,
-                "show-compositor-borders" => self.show_compositor_borders = true,
                 "show-fragment-borders" => self.show_fragment_borders = true,
                 "show-parallel-paint" => self.show_parallel_paint = true,
                 "show-parallel-layout" => self.show_parallel_layout = true,
@@ -525,7 +517,6 @@ pub fn default_opts() -> Opts {
         headless: true,
         hard_fail: true,
         bubble_inline_sizes_separately: false,
-        show_debug_borders: false,
         show_debug_fragment_borders: false,
         show_debug_parallel_paint: false,
         show_debug_parallel_layout: false,
@@ -841,7 +832,6 @@ pub fn from_cmdline_args(args: &[String]) -> ArgumentParsingResult {
         sandbox: opt_match.opt_present("S"),
         random_pipeline_closure_probability: random_pipeline_closure_probability,
         random_pipeline_closure_seed: random_pipeline_closure_seed,
-        show_debug_borders: debug_options.show_compositor_borders,
         show_debug_fragment_borders: debug_options.show_fragment_borders,
         show_debug_parallel_paint: debug_options.show_parallel_paint,
         show_debug_parallel_layout: debug_options.show_parallel_layout,