diff --git a/javascript/notification.js b/javascript/notification.js
new file mode 100644
index 00000000..4711c279
--- /dev/null
+++ b/javascript/notification.js
@@ -0,0 +1,34 @@
+// Monitors the gallery and sends a browser notification when the leading image is new.
+
+let lastHeadImg = null;
+
+onUiUpdate(function(){
+    const galleryPreviews = gradioApp().querySelectorAll('img.h-full.w-full.overflow-hidden');
+
+    if (galleryPreviews == null) return;
+
+    const headImg = galleryPreviews[0]?.src;
+
+    if (headImg == null || headImg == lastHeadImg) return;
+
+    lastHeadImg = headImg;
+
+    if (document.hasFocus()) return;
+
+    // Multiple copies of the images are in the DOM when one is selected. Dedup with a Set to get the real number generated.
+    const imgs = new Set(Array.from(galleryPreviews).map(img => img.src));
+
+    const notification = new Notification(
+        'Stable Diffusion',
+        {
+            body: `Generated ${imgs.size > 1 ? imgs.size - 1 : 1} image${imgs.size > 1 ? 's' : ''}`,
+            icon: headImg,
+            image: headImg,
+        }
+    );
+
+    notification.onclick = function(_){
+        parent.focus();
+        this.close();
+    };
+});
diff --git a/modules/images.py b/modules/images.py
index 530a8440..d1707263 100644
--- a/modules/images.py
+++ b/modules/images.py
@@ -245,34 +245,42 @@ def resize_image(resize_mode, im, width, height):
 
 
 invalid_filename_chars = '<>:"/\\|?*\n'
+invalid_filename_prefix = ' '
+invalid_filename_postfix = ' .'
 re_nonletters = re.compile(r'[\s'+string.punctuation+']+')
+max_filename_part_length = 128
+max_prompt_words = 8
 
 
 def sanitize_filename_part(text, replace_spaces=True):
     if replace_spaces:
         text = text.replace(' ', '_')
 
-    return text.translate({ord(x): '_' for x in invalid_filename_chars})[:128]
+    text = text.translate({ord(x): '_' for x in invalid_filename_chars})
+    text = text.lstrip(invalid_filename_prefix)[:max_filename_part_length]
+    text = text.rstrip(invalid_filename_postfix)
+    return text
 
 
 def apply_filename_pattern(x, p, seed, prompt):
     if seed is not None:
         x = x.replace("[seed]", str(seed))
+
     if prompt is not None:
-        x = x.replace("[prompt]", sanitize_filename_part(prompt)[:128])
-        x = x.replace("[prompt_spaces]", sanitize_filename_part(prompt, replace_spaces=False)[:128])
+        x = x.replace("[prompt]", sanitize_filename_part(prompt))
+        x = x.replace("[prompt_spaces]", sanitize_filename_part(prompt, replace_spaces=False))
         if "[prompt_words]" in x:
             words = [x for x in re_nonletters.split(prompt or "") if len(x) > 0]
             if len(words) == 0:
                 words = ["empty"]
+            x = x.replace("[prompt_words]", sanitize_filename_part(" ".join(words[0:max_prompt_words]), replace_spaces=False))
 
-            x = x.replace("[prompt_words]", " ".join(words[0:8]).strip())
     if p is not None:
         x = x.replace("[steps]", str(p.steps))
         x = x.replace("[cfg]", str(p.cfg_scale))
         x = x.replace("[width]", str(p.width))
         x = x.replace("[height]", str(p.height))
-        x = x.replace("[sampler]", sd_samplers.samplers[p.sampler_index].name)
+        x = x.replace("[sampler]", sanitize_filename_part(sd_samplers.samplers[p.sampler_index].name, replace_spaces=False))
 
     x = x.replace("[model_hash]", shared.sd_model.sd_model_hash)
     x = x.replace("[date]", datetime.date.today().isoformat())
diff --git a/modules/ui.py b/modules/ui.py
index 2c5422c7..ec6f247e 100644
--- a/modules/ui.py
+++ b/modules/ui.py
@@ -875,6 +875,14 @@ def create_ui(txt2img, img2img, run_extras, run_pnginfo):
             outputs=[result]
         )
 
+        request_notifications = gr.Button(value='Request browser notifications')
+        request_notifications.click(
+            fn=lambda: None,
+            inputs=[],
+            outputs=[],
+            _js='() => Notification.requestPermission()'
+        )
+
     interfaces = [
         (txt2img_interface, "txt2img", "txt2img"),
         (img2img_interface, "img2img", "img2img"),