diff --git a/lib/ronin/web/browser.rb b/lib/ronin/web/browser.rb
index 86da56e..e7a34ca 100644
--- a/lib/ronin/web/browser.rb
+++ b/lib/ronin/web/browser.rb
@@ -117,6 +117,9 @@ module Browser
       # @option kwargs [Boolean] headless (true)
       #   Controls whether the browser will start in headless or visible mode.
       #
+      # @option kwargs [Hash{Symbol => Object}, Ferrum::Cookies::Cookie, nil] cookie
+      #   Provides cookie to set for browser after initialization.
+      #
       # @option kwargs [String, nil] url
       #   Provides url for browser to navigate to after initialization.
       #
diff --git a/lib/ronin/web/browser/agent.rb b/lib/ronin/web/browser/agent.rb
index 0c09c78..c73c7b3 100644
--- a/lib/ronin/web/browser/agent.rb
+++ b/lib/ronin/web/browser/agent.rb
@@ -53,12 +53,16 @@ class Agent < Ferrum::Browser
         # @param [String, nil] url
         #   Provides url for browser to navigate to after initialization.
         #
+        # @param [Hash{Symbol => Object}, Ferrum::Cookies::Cookie, nil] cookie
+        #   Provides cookie to set for browser after initialization.
+        #
         # @param [Hash{Symbol => Object}] kwargs
         #   Additional keyword arguments for `Ferrum::Browser#initialize`.
         #
         def initialize(visible:  false,
                        headless: !visible,
                        proxy:    Ronin::Support::Network::HTTP.proxy,
+                       cookie:   nil,
                        url:      nil,
                        **kwargs)
           proxy = case proxy
@@ -87,6 +91,8 @@ def initialize(visible:  false,
           @proxy    = proxy
 
           super(headless: headless, proxy: proxy, **kwargs)
+
+          cookies.set(cookie) if cookie
           go_to(url) if url
         end
 
diff --git a/spec/agent_spec.rb b/spec/agent_spec.rb
index 59911c1..e168095 100644
--- a/spec/agent_spec.rb
+++ b/spec/agent_spec.rb
@@ -33,6 +33,37 @@
       after { subject.quit }
     end
 
+    context "when given the cookie: keyword argument" do
+      subject { described_class.new(cookie: cookie) }
+
+      let(:name)        { '_foo_sess' }
+      let(:value)       { 'eyJmb28iOiJiYXIifQ:1pQcTx:UufiSnuPIjNs7zOAJS0UpqnyvRt7KET7BVes0I8LYbA' }
+      let(:domain)      { 'foo-app.com' }
+      let(:cookie_hash) { { "name" => name, "value" => value, "domain" => domain, "session" => true } }
+
+      context 'when the cookie is a hash' do
+        let(:cookie) { cookie_hash }
+
+        it 'sets the cookie with the correct attributes' do
+          result = subject.cookies[name]
+          expect(result).to be_a Ferrum::Cookies::Cookie
+          expect(result.attributes > cookie).to be true
+        end
+      end
+
+      context 'when the cookie is a Cookie instance' do
+        let(:cookie) { Ferrum::Cookies::Cookie.new(**cookie_hash) }
+
+        it 'sets the cookie with the correct attributes' do
+          result = subject.cookies[name]
+          expect(result).to be_a Ferrum::Cookies::Cookie
+          expect(result.attributes > cookie_hash).to be true
+        end
+      end
+
+      after { subject.quit }
+    end
+
     context "when given the proxy: keyword argument" do
       let(:proxy_host) { 'example.com' }
       let(:proxy_port) { 8080 }