diff --git a/copyparty/httpcli.py b/copyparty/httpcli.py
index 12a92e91..643c7cf5 100644
--- a/copyparty/httpcli.py
+++ b/copyparty/httpcli.py
@@ -3142,8 +3142,9 @@ class HttpCli(object):
             ext = "~" + ext[-9:]
 
         # chrome cannot handle more than ~2000 unique SVGs
-        chrome = " rv:" not in self.ua
-        mime, ico = self.ico.get(ext, not exact, chrome)
+        # so url-param "raster" returns a png/webp instead
+        # (useragent-sniffing kinshi due to caching proxies)
+        mime, ico = self.ico.get(ext, not exact, "raster" in self.uparam)
 
         lm = formatdate(self.E.t0, usegmt=True)
         self.reply(ico, mime=mime, headers={"Last-Modified": lm})
diff --git a/copyparty/web/browser.js b/copyparty/web/browser.js
index 6102a866..03fb2339 100644
--- a/copyparty/web/browser.js
+++ b/copyparty/web/browser.js
@@ -4847,6 +4847,8 @@ var thegrid = (function () {
 				ihref = SR + '/.cpr/ico/' + ext;
 			}
 			ihref += (ihref.indexOf('?') > 0 ? '&' : '?') + 'cache=i&_=' + ACB;
+			if (CHROME)
+				ihref += "&raster";
 
 			html.push('<a href="' + ohref + '" ref="' + ref +
 				'"' + ac + ' ttt="' + esc(name) + '"><img style="height:' +