diff --git a/components/servo/lib.rs b/components/servo/lib.rs
index 653caba39f7..aaa59bf2d8e 100644
--- a/components/servo/lib.rs
+++ b/components/servo/lib.rs
@@ -98,6 +98,7 @@ use profile_traits::mem::MemoryReportResult;
 use profile_traits::{mem, time};
 use script::{JSEngineSetup, ServiceWorkerManager};
 use servo_config::opts::Opts;
+pub use servo_config::prefs::PrefValue;
 use servo_config::prefs::Preferences;
 use servo_config::{opts, pref, prefs};
 use servo_delegate::DefaultServoDelegate;
@@ -1083,6 +1084,12 @@ impl Servo {
                 .send(EmbedderToConstellationMessage::WebDriverCommand(command));
         }
     }
+
+    pub fn set_preference(&self, name: &str, value: PrefValue) {
+        let mut preferences = prefs::get().clone();
+        preferences.set_value(name, value);
+        prefs::set(preferences);
+    }
 }
 
 fn create_embedder_channel(
diff --git a/ports/servoshell/desktop/app.rs b/ports/servoshell/desktop/app.rs
index 06621f69143..c449e993978 100644
--- a/ports/servoshell/desktop/app.rs
+++ b/ports/servoshell/desktop/app.rs
@@ -119,6 +119,7 @@ impl App {
                     event_loop,
                     proxy,
                     self.initial_url.clone(),
+                    &self.servoshell_preferences,
                 ));
                 Rc::new(window)
             },
@@ -321,6 +322,12 @@ impl App {
                         focused_webview.reload();
                     }
                 },
+                MinibrowserEvent::ReloadAll => {
+                    minibrowser.update_location_dirty(false);
+                    for (_, webview) in state.webviews() {
+                        webview.reload();
+                    }
+                },
                 MinibrowserEvent::NewWebView => {
                     minibrowser.update_location_dirty(false);
                     state.create_and_focus_toplevel_webview(Url::parse("servo:newtab").unwrap());
diff --git a/ports/servoshell/desktop/minibrowser.rs b/ports/servoshell/desktop/minibrowser.rs
index 4f62b9e6e7e..1b737f09141 100644
--- a/ports/servoshell/desktop/minibrowser.rs
+++ b/ports/servoshell/desktop/minibrowser.rs
@@ -22,7 +22,9 @@ use servo::base::id::WebViewId;
 use servo::servo_geometry::DeviceIndependentPixel;
 use servo::servo_url::ServoUrl;
 use servo::webrender_api::units::DevicePixel;
-use servo::{Image, LoadStatus, OffscreenRenderingContext, PixelFormat, RenderingContext, WebView};
+use servo::{
+    Image, LoadStatus, OffscreenRenderingContext, PixelFormat, PrefValue, RenderingContext, WebView,
+};
 use winit::event::{ElementState, MouseButton, WindowEvent};
 use winit::event_loop::ActiveEventLoop;
 use winit::window::Window;
@@ -33,6 +35,7 @@ use super::events_loop::EventLoopProxy;
 use super::geometry::winit_position_to_euclid_point;
 use super::headed_window::Window as ServoWindow;
 use crate::desktop::window_trait::WindowPortsMethods;
+use crate::prefs::{EXPERIMENTAL_PREFS, ServoShellPreferences};
 
 pub struct Minibrowser {
     rendering_context: Rc<OffscreenRenderingContext>,
@@ -55,6 +58,9 @@ pub struct Minibrowser {
     ///
     /// These need to be cached across egui draw calls.
     favicon_textures: HashMap<WebViewId, (egui::TextureHandle, egui::load::SizedTexture)>,
+
+    /// Whether the user has enabled experimental preferences.
+    experimental_prefs_enabled: bool,
 }
 
 pub enum MinibrowserEvent {
@@ -63,6 +69,7 @@ pub enum MinibrowserEvent {
     Back,
     Forward,
     Reload,
+    ReloadAll,
     NewWebView,
     CloseWebView(WebViewId),
 }
@@ -88,6 +95,7 @@ impl Minibrowser {
         event_loop: &ActiveEventLoop,
         event_loop_proxy: EventLoopProxy,
         initial_url: ServoUrl,
+        preferences: &ServoShellPreferences,
     ) -> Self {
         let rendering_context = window.offscreen_rendering_context();
         // Adapted from https://github.com/emilk/egui/blob/9478e50d012c5138551c38cbee16b07bc1fcf283/crates/egui_glow/examples/pure_glow.rs
@@ -118,6 +126,7 @@ impl Minibrowser {
             load_status: LoadStatus::Complete,
             status_text: None,
             favicon_textures: Default::default(),
+            experimental_prefs_enabled: preferences.experimental_prefs_enabled,
         }
     }
 
@@ -336,6 +345,19 @@ impl Minibrowser {
                                 ui.available_size(),
                                 egui::Layout::right_to_left(egui::Align::Center),
                                 |ui| {
+                                    let prefs_toggle = ui
+                                        .toggle_value(&mut self.experimental_prefs_enabled, "☢")
+                                        .on_hover_text("Enable experimental prefs");
+                                    if prefs_toggle.clicked() {
+                                        let enable = self.experimental_prefs_enabled;
+                                        for pref in EXPERIMENTAL_PREFS {
+                                            state
+                                                .servo()
+                                                .set_preference(pref, PrefValue::Bool(enable));
+                                        }
+                                        event_queue.borrow_mut().push(MinibrowserEvent::ReloadAll);
+                                    }
+
                                     let location_id = egui::Id::new("location_input");
                                     let location_field = ui.add_sized(
                                         ui.available_size(),
diff --git a/ports/servoshell/prefs.rs b/ports/servoshell/prefs.rs
index 4311562074c..bc3c2a84eae 100644
--- a/ports/servoshell/prefs.rs
+++ b/ports/servoshell/prefs.rs
@@ -88,6 +88,9 @@ pub(crate) struct ServoShellPreferences {
     /// Log also to a file
     #[cfg(target_env = "ohos")]
     pub log_to_file: bool,
+
+    /// Whether the CLI option to enable experimental prefs was present at startup.
+    pub experimental_prefs_enabled: bool,
 }
 
 impl Default for ServoShellPreferences {
@@ -111,6 +114,7 @@ impl Default for ServoShellPreferences {
             log_filter: None,
             #[cfg(target_env = "ohos")]
             log_to_file: false,
+            experimental_prefs_enabled: false,
         }
     }
 }
@@ -605,7 +609,9 @@ pub(crate) fn parse_command_line_arguments(args: Vec<String>) -> ArgumentParsing
         })
         .collect();
 
-    if opt_match.opt_present("enable-experimental-web-platform-features") {
+    let experimental_prefs_enabled =
+        opt_match.opt_present("enable-experimental-web-platform-features");
+    if experimental_prefs_enabled {
         for pref in EXPERIMENTAL_PREFS {
             preferences.set_value(pref, PrefValue::Bool(true));
         }
@@ -677,6 +683,7 @@ pub(crate) fn parse_command_line_arguments(args: Vec<String>) -> ArgumentParsing
         log_filter,
         #[cfg(target_env = "ohos")]
         log_to_file,
+        experimental_prefs_enabled,
         ..Default::default()
     };