diff --git a/apps/browser/src/background/main.background.ts b/apps/browser/src/background/main.background.ts
index 776f0570249..05495472d30 100644
--- a/apps/browser/src/background/main.background.ts
+++ b/apps/browser/src/background/main.background.ts
@@ -70,6 +70,7 @@ import {
   UserNotificationSettingsService,
   UserNotificationSettingsServiceAbstraction,
 } from "@bitwarden/common/autofill/services/user-notification-settings.service";
+import { isUrlInList } from "@bitwarden/common/autofill/utils";
 import { BillingAccountProfileStateService } from "@bitwarden/common/billing/abstractions/account/billing-account-profile-state.service";
 import { DefaultBillingAccountProfileStateService } from "@bitwarden/common/billing/services/account/billing-account-profile-state.service";
 import { ClientType } from "@bitwarden/common/enums";
@@ -1384,18 +1385,11 @@ export default class MainBackground {
     const tab = await BrowserApi.getTabFromCurrentWindow();
 
     if (tab) {
-      const currentUriIsBlocked = await firstValueFrom(
+      const currentUrlIsBlocked = await firstValueFrom(
         this.domainSettingsService.blockedInteractionsUris$.pipe(
-          map((blockedInteractionsUris) => {
-            if (blockedInteractionsUris && tab?.url?.length) {
-              const tabURL = new URL(tab.url);
-              const tabIsBlocked = Object.keys(blockedInteractionsUris).some((blockedHostname) =>
-                tabURL.hostname.endsWith(blockedHostname),
-              );
-
-              if (tabIsBlocked) {
-                return true;
-              }
+          map((blockedInteractionsUrls) => {
+            if (blockedInteractionsUrls && tab?.url?.length) {
+              return isUrlInList(tab.url, blockedInteractionsUrls);
             }
 
             return false;
@@ -1403,7 +1397,7 @@ export default class MainBackground {
         ),
       );
 
-      await this.cipherContextMenuHandler?.update(tab.url, currentUriIsBlocked);
+      await this.cipherContextMenuHandler?.update(tab.url, currentUrlIsBlocked);
       this.onUpdatedRan = this.onReplacedRan = false;
     }
   }
diff --git a/apps/browser/src/platform/services/browser-script-injector.service.ts b/apps/browser/src/platform/services/browser-script-injector.service.ts
index c2bace669dc..a617f2215c0 100644
--- a/apps/browser/src/platform/services/browser-script-injector.service.ts
+++ b/apps/browser/src/platform/services/browser-script-injector.service.ts
@@ -1,6 +1,7 @@
 import { firstValueFrom } from "rxjs";
 
 import { DomainSettingsService } from "@bitwarden/common/autofill/services/domain-settings.service";
+import { isUrlInList } from "@bitwarden/common/autofill/utils";
 // FIXME: Update this file to be type safe and remove this and next line
 // @ts-strict-ignore
 import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
@@ -39,23 +40,20 @@ export class BrowserScriptInjectorService extends ScriptInjectorService {
     }
 
     const tab = tabId && (await BrowserApi.getTab(tabId));
-    const tabURL = tab?.url ? new URL(tab.url) : null;
 
-    // Check if the tab URI is on the disabled URIs list
+    // Check if the tab URL is on the disabled URLs list
     let injectionAllowedInTab = true;
     const blockedDomains = await firstValueFrom(
       this.domainSettingsService.blockedInteractionsUris$,
     );
 
-    if (blockedDomains && tabURL?.hostname) {
-      const blockedDomainsSet = new Set(Object.keys(blockedDomains));
-
-      injectionAllowedInTab = !(tabURL && blockedDomainsSet.has(tabURL.hostname));
+    if (blockedDomains && tab?.url) {
+      injectionAllowedInTab = !isUrlInList(tab?.url, blockedDomains);
     }
 
     if (!injectionAllowedInTab) {
       this.logService.warning(
-        `${injectDetails.file} was not injected because ${tabURL?.hostname || "the tab URI"} is on the user's blocked domains list.`,
+        `${injectDetails.file} was not injected because ${tab?.url || "the tab URL"} is on the user's blocked domains list.`,
       );
       return;
     }
diff --git a/apps/browser/src/vault/popup/services/vault-popup-autofill.service.ts b/apps/browser/src/vault/popup/services/vault-popup-autofill.service.ts
index c65661fdfb2..41d76078fdb 100644
--- a/apps/browser/src/vault/popup/services/vault-popup-autofill.service.ts
+++ b/apps/browser/src/vault/popup/services/vault-popup-autofill.service.ts
@@ -16,10 +16,12 @@ import {
 
 import { AccountService } from "@bitwarden/common/auth/abstractions/account.service";
 import { DomainSettingsService } from "@bitwarden/common/autofill/services/domain-settings.service";
+import { isUrlInList } from "@bitwarden/common/autofill/utils";
 import { I18nService } from "@bitwarden/common/platform/abstractions/i18n.service";
 import { LogService } from "@bitwarden/common/platform/abstractions/log.service";
 import { MessagingService } from "@bitwarden/common/platform/abstractions/messaging.service";
 import { PlatformUtilsService } from "@bitwarden/common/platform/abstractions/platform-utils.service";
+import { Utils } from "@bitwarden/common/platform/misc/utils";
 import { CipherService } from "@bitwarden/common/vault/abstractions/cipher.service";
 import { CipherRepromptType, CipherType } from "@bitwarden/common/vault/enums";
 import { CipherView } from "@bitwarden/common/vault/models/view/cipher.view";
@@ -70,14 +72,9 @@ export class VaultPopupAutofillService {
     this.domainSettingsService.blockedInteractionsUris$,
     this.currentAutofillTab$,
   ]).pipe(
-    map(([blockedInteractionsUris, currentTab]) => {
-      if (blockedInteractionsUris && currentTab?.url?.length) {
-        const tabURL = new URL(currentTab.url);
-        const tabIsBlocked = Object.keys(blockedInteractionsUris).includes(tabURL.hostname);
-
-        if (tabIsBlocked) {
-          return true;
-        }
+    map(([blockedInteractionsUrls, currentTab]) => {
+      if (blockedInteractionsUrls && currentTab) {
+        return isUrlInList(currentTab?.url, blockedInteractionsUrls);
       }
 
       return false;
@@ -89,13 +86,18 @@ export class VaultPopupAutofillService {
     this.domainSettingsService.blockedInteractionsUris$,
     this.currentAutofillTab$,
   ]).pipe(
-    map(([blockedInteractionsUris, currentTab]) => {
-      if (blockedInteractionsUris && currentTab?.url?.length) {
-        const tabURL = new URL(currentTab.url);
-        const tabIsBlocked = Object.keys(blockedInteractionsUris).includes(tabURL.hostname);
+    map(([blockedInteractionsUrls, currentTab]) => {
+      if (blockedInteractionsUrls && currentTab?.url?.length) {
+        const tabHostname = Utils.getHostname(currentTab.url);
+
+        if (!tabHostname) {
+          return false;
+        }
+
+        const tabIsBlocked = isUrlInList(currentTab.url, blockedInteractionsUrls);
 
         const showScriptInjectionIsBlockedBanner =
-          tabIsBlocked && !blockedInteractionsUris[tabURL.hostname]?.bannerIsDismissed;
+          tabIsBlocked && !blockedInteractionsUrls[tabHostname]?.bannerIsDismissed;
 
         return showScriptInjectionIsBlockedBanner;
       }
@@ -108,20 +110,22 @@ export class VaultPopupAutofillService {
   async dismissCurrentTabIsBlockedBanner() {
     try {
       const currentTab = await firstValueFrom(this.currentAutofillTab$);
-      const currentTabURL = currentTab?.url.length && new URL(currentTab.url);
-
-      const currentTabHostname = currentTabURL && currentTabURL.hostname;
+      const currentTabHostname = currentTab?.url.length && Utils.getHostname(currentTab.url);
 
       if (!currentTabHostname) {
         return;
       }
 
-      const blockedURIs = await firstValueFrom(this.domainSettingsService.blockedInteractionsUris$);
-      const tabIsBlocked = Object.keys(blockedURIs).includes(currentTabHostname);
+      const blockedURLs = await firstValueFrom(this.domainSettingsService.blockedInteractionsUris$);
+
+      let tabIsBlocked = false;
+      if (blockedURLs && currentTab?.url?.length) {
+        tabIsBlocked = isUrlInList(currentTab.url, blockedURLs);
+      }
 
       if (tabIsBlocked) {
         void this.domainSettingsService.setBlockedInteractionsUris({
-          ...blockedURIs,
+          ...blockedURLs,
           [currentTabHostname as string]: { bannerIsDismissed: true },
         });
       }
@@ -129,7 +133,7 @@ export class VaultPopupAutofillService {
       // eslint-disable-next-line @typescript-eslint/no-unused-vars
     } catch (e) {
       throw new Error(
-        "There was a problem dismissing the blocked interaction URI notification banner",
+        "There was a problem dismissing the blocked interaction URL notification banner",
       );
     }
   }
@@ -147,11 +151,9 @@ export class VaultPopupAutofillService {
       }
 
       return this.domainSettingsService.blockedInteractionsUris$.pipe(
-        switchMap((blockedURIs) => {
-          // This blocked URI logic will be updated to use the common util in PM-18219
-          if (blockedURIs && tab?.url?.length) {
-            const tabURL = new URL(tab.url);
-            const tabIsBlocked = Object.keys(blockedURIs).includes(tabURL.hostname);
+        switchMap((blockedURLs) => {
+          if (blockedURLs && tab?.url?.length) {
+            const tabIsBlocked = isUrlInList(tab.url, blockedURLs);
 
             if (tabIsBlocked) {
               return of([]);
diff --git a/libs/common/src/autofill/utils.spec.ts b/libs/common/src/autofill/utils.spec.ts
index 554dc973b48..93f515aa338 100644
--- a/libs/common/src/autofill/utils.spec.ts
+++ b/libs/common/src/autofill/utils.spec.ts
@@ -1,6 +1,13 @@
+import { NeverDomains } from "@bitwarden/common/models/domain/domain-service";
+
 import { CardView } from "../vault/models/view/card.view";
 
-import { normalizeExpiryYearFormat, isCardExpired, parseYearMonthExpiry } from "./utils";
+import {
+  isCardExpired,
+  isUrlInList,
+  normalizeExpiryYearFormat,
+  parseYearMonthExpiry,
+} from "./utils";
 
 function getExpiryYearValueFormats(currentCentury: string) {
   return [
@@ -281,3 +288,73 @@ describe("parseYearMonthExpiry", () => {
     });
   });
 });
+
+describe("isUrlInList", () => {
+  let mockUrlList: NeverDomains;
+
+  it("returns false if the passed URL list is empty", () => {
+    const urlIsInList = isUrlInList("", mockUrlList);
+
+    expect(urlIsInList).toEqual(false);
+  });
+
+  it("returns true if the URL hostname is on the passed URL list", () => {
+    mockUrlList = {
+      ["bitwarden.com"]: { bannerIsDismissed: true },
+      ["duckduckgo.com"]: null,
+      [".lan"]: null,
+      [".net"]: null,
+      ["localhost"]: null,
+      ["extensions"]: null,
+    };
+
+    const testPages = [
+      "https://www.bitwarden.com/landing-page?some_query_string_key=1&another_one=1",
+      " https://duckduckgo.com/pro  ", // Note: embedded whitespacing is intentional
+      "https://network-private-domain.lan/homelabs-dashboard",
+      "https://jsfiddle.net/",
+      "https://localhost:8443/#/login",
+      "chrome://extensions/",
+    ];
+
+    for (const pageUrl of testPages) {
+      const urlIsInList = isUrlInList(pageUrl, mockUrlList);
+
+      expect(urlIsInList).toEqual(true);
+    }
+  });
+
+  it("returns false if no items on the passed URL list are a full match for the page hostname", () => {
+    const urlIsInList = isUrlInList("https://paypal.com/", {
+      ["some.packed.subdomains.sandbox.paypal.com"]: null,
+    });
+
+    expect(urlIsInList).toEqual(false);
+  });
+
+  it("returns false if the URL hostname is not on the passed URL list", () => {
+    const testPages = ["https://archive.org/", "bitwarden.com.some.otherdomain.com"];
+
+    for (const pageUrl of testPages) {
+      const urlIsInList = isUrlInList(pageUrl, mockUrlList);
+
+      expect(urlIsInList).toEqual(false);
+    }
+  });
+
+  it("returns false if the passed URL is empty", () => {
+    const urlIsInList = isUrlInList("", mockUrlList);
+
+    expect(urlIsInList).toEqual(false);
+  });
+
+  it("returns false if the passed URL is not a valid URL", () => {
+    const testPages = ["twasbrillingandtheslithytoves", "/landing-page", undefined];
+
+    for (const pageUrl of testPages) {
+      const urlIsInList = isUrlInList(pageUrl, mockUrlList);
+
+      expect(urlIsInList).toEqual(false);
+    }
+  });
+});
diff --git a/libs/common/src/autofill/utils.ts b/libs/common/src/autofill/utils.ts
index a77ea8a715d..3078e15bce2 100644
--- a/libs/common/src/autofill/utils.ts
+++ b/libs/common/src/autofill/utils.ts
@@ -1,3 +1,6 @@
+import { NeverDomains } from "@bitwarden/common/models/domain/domain-service";
+import { Utils } from "@bitwarden/common/platform/misc/utils";
+
 import { CardView } from "../vault/models/view/card.view";
 
 import {
@@ -329,3 +332,29 @@ export function parseYearMonthExpiry(combinedExpiryValue: string): [Year | null,
 
   return [parsedYear, parsedMonth];
 }
+
+/**
+ * Takes a URL string and a NeverDomains object and determines if the passed URL's hostname is in `urlList`
+ *
+ * @param {string} url - representation of URL to check
+ * @param {NeverDomains} urlList - object with hostname key names
+ */
+export function isUrlInList(url: string = "", urlList: NeverDomains = {}): boolean {
+  const urlListKeys = urlList && Object.keys(urlList);
+
+  if (urlListKeys.length && url?.length) {
+    let tabHostname;
+    try {
+      tabHostname = Utils.getHostname(url);
+    } catch {
+      // If the input was invalid, exit early and return false
+      return false;
+    }
+
+    if (tabHostname) {
+      return urlListKeys.some((blockedHostname) => tabHostname.endsWith(blockedHostname));
+    }
+  }
+
+  return false;
+}