diff --git a/modules/desktop/browsers/firefox.nix b/modules/desktop/browsers/firefox.nix
index 2488f33..134873f 100644
--- a/modules/desktop/browsers/firefox.nix
+++ b/modules/desktop/browsers/firefox.nix
@@ -36,6 +36,8 @@ in {
           ## Preferences
           "browser.ctrlTab.sortByRecentlyUsed" = true;
           "browser.discovery.enabled" = false;
+          "browser.download.open_pdf_attachments_inline" = true;
+          "browser.menu.showViewImageInfo" = true;
           "browser.newtabpage.enabled" = false;
           "browser.newtabpage.activity-stream.showSponsored" = false;
           "browser.newtabpage.activity-stream.showSponsoredTopSites" = false;
@@ -46,14 +48,44 @@ in {
           "browser.startup.homepage" = "https://www.vimium.com";
           "browser.toolbars.bookmarks.visibility" = "never";
           "browser.uitour.enabled" = false;
-          "media.memory_cache_max_size" = 65536;
+          "browser.urlbar.suggest.engines" = false;
+          "browser.urlbar.suggest.calculator" = true;
+          "browser.urlbar.trending.featureGate" = false;
+          "browser.urlbar.unitConversion.enabled" = true;
+          "cookiebanners.service.mode" = 1;
+          "cookiebanners.service.mode.privateBrowsing" = 1;
+          "network.IDN_show_punycode" = true;
 
           ## Performance
+          "browser.cache.jsbc_compression_level" = 3;
+          "content.notify.interval" = 100000;
+          "dom.enable_web_task_scheduling" = true;
+          "dom.security.sanitizer.enabled" = true;
+          "gfx.canvas.accelerated.cache-items" = 4096;
+          "gfx.canvas.accelerated.cache-size" = 512;
+          "gfx.content.skia-font-cache-size" = 20;
           "gfx.webrender.all" = true;
           "gfx.webrender.compositor" = true;
           "gfx.webrender.enable" = true;
+          "image.mem.decode_bytes_at_a_time" = 32768;
           "layers.acceleration.force-enabled" = true;
+          "layout.css.grid-template-masonry-value.enabled" = true;
           "media.ffmpeg.vaapi.enabled" = true;
+          "media.memory_cache_max_size" = 65536;
+          "media.cache_readahead_limit" = 7200;
+          "media.cache_resume_threshold" = 3600;
+          "network.dns.disablePrefetch" = true;
+          "network.dns.disablePrefetchFromHTTPS" = true;
+          "network.dnsCacheExpiration" = 3600;
+          "network.http.max-connections" = 1800;
+          "network.http.max-persistent-connections-per-server" = 10;
+          "network.http.max-urgent-start-excessive-connections-per-host" = 5;
+          "network.http.pacing.requests.enabled" = false;
+          "network.predictor.enabled" = false;
+          "network.prefetch-next" = false;
+          "network.ssl_tokens_cache_capacity" = 10240;
+          "pdfjs.enableScripting" = false;
+          "security.mixed_content.block_display_content" = true;
 
           ## Experiments
           "app.normandy.enabled" = false;