diff --git a/app/assets/javascripts/lib/utils/axios_utils.js b/app/assets/javascripts/lib/utils/axios_utils.js
index c17f62c671c..a04fe609015 100644
--- a/app/assets/javascripts/lib/utils/axios_utils.js
+++ b/app/assets/javascripts/lib/utils/axios_utils.js
@@ -1,5 +1,6 @@
 import axios from 'axios';
 import csrf from './csrf';
+import suppressAjaxErrorsDuringNavigation from './suppress_ajax_errors_during_navigation';
 
 axios.defaults.headers.common[csrf.headerKey] = csrf.token;
 // Used by Rails to check if it is a valid XHR request
@@ -25,6 +26,20 @@ axios.interceptors.response.use(
   },
 );
 
+let isUserNavigating = false;
+window.addEventListener('beforeunload', () => {
+  isUserNavigating = true;
+});
+
+// Ignore AJAX errors caused by requests
+// being cancelled due to browser navigation
+const { gon } = window;
+const featureFlagEnabled = gon && gon.features && gon.features.suppressAjaxNavigationErrors;
+axios.interceptors.response.use(
+  response => response,
+  err => suppressAjaxErrorsDuringNavigation(err, isUserNavigating, featureFlagEnabled),
+);
+
 export default axios;
 
 /**
diff --git a/app/assets/javascripts/lib/utils/suppress_ajax_errors_during_navigation.js b/app/assets/javascripts/lib/utils/suppress_ajax_errors_during_navigation.js
new file mode 100644
index 00000000000..4c61da9b862
--- /dev/null
+++ b/app/assets/javascripts/lib/utils/suppress_ajax_errors_during_navigation.js
@@ -0,0 +1,16 @@
+/**
+ * An Axios error interceptor that suppresses AJAX errors caused
+ * by the request being cancelled when the user navigates to a new page
+ */
+export default (err, isUserNavigating, featureFlagEnabled) => {
+  if (featureFlagEnabled && isUserNavigating && err.code === 'ECONNABORTED') {
+    // If the user is navigating away from the current page,
+    // prevent .then() and .catch() handlers from being
+    // called by returning a Promise that never resolves
+    return new Promise(() => {});
+  }
+
+  // The error is not related to browser navigation,
+  // so propagate the error
+  return Promise.reject(err);
+};
diff --git a/db/post_migrate/20190909141517_update_cs_vulnerability_confidence_column.rb b/db/post_migrate/20190909141517_update_cs_vulnerability_confidence_column.rb
new file mode 100644
index 00000000000..20f5e7ae0dc
--- /dev/null
+++ b/db/post_migrate/20190909141517_update_cs_vulnerability_confidence_column.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+class UpdateCsVulnerabilityConfidenceColumn < ActiveRecord::Migration[5.2]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  DOWNTIME = false
+  BATCH_SIZE = 1_000
+  INTERVAL = 5.minutes
+
+  # 137_424 records to be updated on GitLab.com,
+  # giving us an estimated runtime of 12 hours.
+  def up
+    migration = Gitlab::BackgroundMigration::UpdateVulnerabilityConfidence
+    migration_name = migration.to_s.demodulize
+    relation = migration::Occurrence.container_scanning_reports_with_medium_confidence
+    queue_background_migration_jobs_by_range_at_intervals(relation,
+                                                          migration_name,
+                                                          INTERVAL,
+                                                          batch_size: BATCH_SIZE)
+  end
+
+  def down
+    # no-op
+  end
+end
diff --git a/doc/administration/geo/replication/high_availability.md b/doc/administration/geo/replication/high_availability.md
index 2b6926c1351..8d09712d101 100644
--- a/doc/administration/geo/replication/high_availability.md
+++ b/doc/administration/geo/replication/high_availability.md
@@ -71,8 +71,16 @@ high availability configuration documentation for
 [PostgreSQL](../../high_availability/database.md#configuring-the-application-nodes)
 and [Redis](../../high_availability/redis.md#example-configuration-for-the-gitlab-application).
 
-The **primary** database will require modification later, as part of
-[step 2](#step-2-configure-the-main-read-only-replica-postgresql-database-on-the-secondary-node).
+### Step 2: Configure the **primary** database
+
+1. Edit `/etc/gitlab/gitlab.rb` and add the following:
+
+   ```ruby
+   ##
+   ## Configure the Geo primary role and the PostgreSQL role
+   ##
+   roles ['geo_primary_role', 'postgres_role']
+   ```
 
 ## Configure a **secondary** node
 
@@ -115,9 +123,9 @@ the **primary** database. Use the following as a guide.
 
    ```ruby
    ##
-   ## Configure the PostgreSQL role
+   ## Configure the Geo secondary role and the PostgreSQL role
    ##
-   roles ['postgres_role']
+   roles ['geo_secondary_role', 'postgres_role']
 
    ##
    ## Secondary address
diff --git a/jest.config.js b/jest.config.js
index 34581c6532a..43d68c60137 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -19,7 +19,8 @@ let testMatch = ['<rootDir>/spec/frontend/**/*_spec.js', '<rootDir>/ee/spec/fron
 
 // workaround for eslint-import-resolver-jest only resolving in test files
 // see https://github.com/JoinColony/eslint-import-resolver-jest#note
-const isESLint = module.parent.filename.includes('/eslint-import-resolver-jest/');
+const { filename: parentModuleName } = module.parent;
+const isESLint = parentModuleName && parentModuleName.includes('/eslint-import-resolver-jest/');
 if (isESLint) {
   testMatch = testMatch.map(path => path.replace('_spec.js', ''));
 }
diff --git a/lib/gitlab/background_migration/update_vulnerability_confidence.rb b/lib/gitlab/background_migration/update_vulnerability_confidence.rb
new file mode 100644
index 00000000000..f02f8151778
--- /dev/null
+++ b/lib/gitlab/background_migration/update_vulnerability_confidence.rb
@@ -0,0 +1,35 @@
+# frozen_string_literal: true
+# rubocop:disable Style/Documentation
+module Gitlab
+  module BackgroundMigration
+    class UpdateVulnerabilityConfidence
+      class Occurrence < ActiveRecord::Base
+        include ::EachBatch
+
+        self.table_name = 'vulnerability_occurrences'
+
+        REPORT_TYPES = {
+          container_scanning: 2
+        }.freeze
+
+        CONFIDENCE_LEVELS = {
+          unknown: 2,
+          medium: 5
+        }.freeze
+
+        enum confidences: CONFIDENCE_LEVELS
+        enum report_type: REPORT_TYPES
+
+        def self.container_scanning_reports_with_medium_confidence
+          where(report_type: self.report_types[:container_scanning], confidence: self.confidences[:medium])
+        end
+      end
+
+      def perform(start_id, stop_id)
+        Occurrence.container_scanning_reports_with_medium_confidence
+                  .where(id: start_id..stop_id)
+                  .update_all(confidence: Occurrence.confidences[:unknown])
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/gl_repository/repo_type.rb b/lib/gitlab/gl_repository/repo_type.rb
index 19915980d7f..01bc27f963b 100644
--- a/lib/gitlab/gl_repository/repo_type.rb
+++ b/lib/gitlab/gl_repository/repo_type.rb
@@ -40,3 +40,5 @@ module Gitlab
     end
   end
 end
+
+Gitlab::GlRepository::RepoType.prepend_if_ee('EE::Gitlab::GlRepository::RepoType')
diff --git a/lib/gitlab/gon_helper.rb b/lib/gitlab/gon_helper.rb
index 92917028851..2616a19fdaa 100644
--- a/lib/gitlab/gon_helper.rb
+++ b/lib/gitlab/gon_helper.rb
@@ -38,6 +38,10 @@ module Gitlab
         gon.current_user_fullname = current_user.name
         gon.current_user_avatar_url = current_user.avatar_url
       end
+
+      # Initialize gon.features with any flags that should be
+      # made globally available to the frontend
+      push_frontend_feature_flag(:suppress_ajax_navigation_errors, default_enabled: true)
     end
 
     # Exposes the state of a feature flag to the frontend code.
diff --git a/spec/frontend/helpers/test_constants.js b/spec/frontend/helpers/test_constants.js
index 8dc4aef87e1..c97d47a6406 100644
--- a/spec/frontend/helpers/test_constants.js
+++ b/spec/frontend/helpers/test_constants.js
@@ -1,2 +1,7 @@
-// eslint-disable-next-line import/prefer-default-export
+export const FIXTURES_PATH = `/fixtures`;
 export const TEST_HOST = 'http://test.host';
+
+export const DUMMY_IMAGE_URL = `${FIXTURES_PATH}/static/images/one_white_pixel.png`;
+
+export const GREEN_BOX_IMAGE_URL = `${FIXTURES_PATH}/static/images/green_box.png`;
+export const RED_BOX_IMAGE_URL = `${FIXTURES_PATH}/static/images/red_box.png`;
diff --git a/spec/frontend/lib/utils/suppress_ajax_errors_during_navigation_spec.js b/spec/frontend/lib/utils/suppress_ajax_errors_during_navigation_spec.js
new file mode 100644
index 00000000000..89e8459d594
--- /dev/null
+++ b/spec/frontend/lib/utils/suppress_ajax_errors_during_navigation_spec.js
@@ -0,0 +1,37 @@
+import suppressAjaxErrorsDuringNavigation from '~/lib/utils/suppress_ajax_errors_during_navigation';
+import waitForPromises from 'helpers/wait_for_promises';
+
+describe('suppressAjaxErrorsDuringNavigation', () => {
+  const OTHER_ERR_CODE = 'foo';
+  const NAV_ERR_CODE = 'ECONNABORTED';
+
+  it.each`
+    isFeatureFlagEnabled | isUserNavigating | code
+    ${false}             | ${false}         | ${OTHER_ERR_CODE}
+    ${false}             | ${false}         | ${NAV_ERR_CODE}
+    ${false}             | ${true}          | ${OTHER_ERR_CODE}
+    ${false}             | ${true}          | ${NAV_ERR_CODE}
+    ${true}              | ${false}         | ${OTHER_ERR_CODE}
+    ${true}              | ${false}         | ${NAV_ERR_CODE}
+    ${true}              | ${true}          | ${OTHER_ERR_CODE}
+  `('should return a rejected Promise', ({ isFeatureFlagEnabled, isUserNavigating, code }) => {
+    const err = { code };
+    const actual = suppressAjaxErrorsDuringNavigation(err, isUserNavigating, isFeatureFlagEnabled);
+
+    return expect(actual).rejects.toBe(err);
+  });
+
+  it('should return a Promise that never resolves', () => {
+    const err = { code: NAV_ERR_CODE };
+    const actual = suppressAjaxErrorsDuringNavigation(err, true, true);
+
+    const thenCallback = jest.fn();
+    const catchCallback = jest.fn();
+    actual.then(thenCallback).catch(catchCallback);
+
+    return waitForPromises().then(() => {
+      expect(thenCallback).not.toHaveBeenCalled();
+      expect(catchCallback).not.toHaveBeenCalled();
+    });
+  });
+});
diff --git a/spec/javascripts/frequent_items/components/app_spec.js b/spec/javascripts/frequent_items/components/app_spec.js
index 6814f656f5d..36dd8604d08 100644
--- a/spec/javascripts/frequent_items/components/app_spec.js
+++ b/spec/javascripts/frequent_items/components/app_spec.js
@@ -236,8 +236,15 @@ describe('Frequent Items App Component', () => {
         .then(() => {
           expect(vm.$el.querySelector('.loading-animation')).toBeDefined();
         })
+
+        // This test waits for multiple ticks in order to allow the responses to
+        // propagate through each interceptor installed on the Axios instance.
+        // This shouldn't be necessary; this test should be refactored to avoid this.
+        // https://gitlab.com/gitlab-org/gitlab/issues/32479
         .then(vm.$nextTick)
         .then(vm.$nextTick)
+        .then(vm.$nextTick)
+
         .then(() => {
           expect(vm.$el.querySelectorAll('.frequent-items-list-container li').length).toBe(
             mockSearchedProjects.length,
diff --git a/spec/javascripts/test_constants.js b/spec/javascripts/test_constants.js
index c97d47a6406..51c0716b99d 100644
--- a/spec/javascripts/test_constants.js
+++ b/spec/javascripts/test_constants.js
@@ -1,7 +1 @@
-export const FIXTURES_PATH = `/fixtures`;
-export const TEST_HOST = 'http://test.host';
-
-export const DUMMY_IMAGE_URL = `${FIXTURES_PATH}/static/images/one_white_pixel.png`;
-
-export const GREEN_BOX_IMAGE_URL = `${FIXTURES_PATH}/static/images/green_box.png`;
-export const RED_BOX_IMAGE_URL = `${FIXTURES_PATH}/static/images/red_box.png`;
+export * from '../frontend/helpers/test_constants';
diff --git a/spec/lib/gitlab/background_migration/update_vulnerability_confidence_spec.rb b/spec/lib/gitlab/background_migration/update_vulnerability_confidence_spec.rb
new file mode 100644
index 00000000000..1217edfecc3
--- /dev/null
+++ b/spec/lib/gitlab/background_migration/update_vulnerability_confidence_spec.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Gitlab::BackgroundMigration::UpdateVulnerabilityConfidence, :migration, schema: 20190909141517 do
+  let(:vulnerabilities) { table(:vulnerability_occurrences) }
+  let(:identifiers) { table(:vulnerability_identifiers) }
+  let(:scanners) { table(:vulnerability_scanners) }
+  let(:projects) { table(:projects) }
+  let(:vul1) { attributes_for(:vulnerabilities_occurrence) }
+  let(:vul2) { attributes_for(:vulnerabilities_occurrence) }
+  let(:vul3) { attributes_for(:vulnerabilities_occurrence) }
+
+  it 'updates confidence level for container scanning reports' do
+    projects.create!(id: 123, namespace_id: 12, name: 'gitlab', path: 'gitlab')
+
+    (1..3).to_a.each do |identifier_id|
+      identifiers.create!(id: identifier_id,
+                          project_id: 123,
+                          fingerprint: 'd432c2ad2953e8bd587a3a43b3ce309b5b0154c' + identifier_id.to_s,
+                          external_type: 'SECURITY_ID',
+                          external_id: 'SECURITY_0',
+                          name: 'SECURITY_IDENTIFIER 0')
+    end
+
+    scanners.create!(id: 6, project_id: 123, external_id: 'clair', name: 'Security Scanner')
+
+    vulnerabilities.create!(container_scanning_vuln_params(vul1, 1))
+    vulnerabilities.create!(container_scanning_vuln_params(vul2, 2))
+    vulnerabilities.create!(container_scanning_vuln_params(vul3, 3).merge(report_type: 1))
+
+    expect(vulnerabilities.where(report_type: 2, confidence: 2).count). to eq(0)
+    expect(vulnerabilities.exists?(report_type: 2, confidence: 5)).to be_truthy
+
+    described_class.new.perform(1, 3)
+
+    expect(vulnerabilities.exists?(report_type: 2, confidence: 5)).to be_falsy
+    expect(vulnerabilities.where(report_type: 2, confidence: 2).count). to eq(2)
+  end
+
+  def container_scanning_vuln_params(vul, primary_identifier_id)
+    {
+      id: vul[:id],
+      severity: 2,
+      confidence: 5,
+      report_type: 2,
+      project_id: 123,
+      scanner_id: 6,
+      primary_identifier_id: primary_identifier_id,
+      project_fingerprint: vul[:project_fingerprint],
+      location_fingerprint: vul[:location_fingerprint],
+      uuid: vul[:uuid],
+      name: vul[:name],
+      metadata_version: '1.3',
+      raw_metadata: vul3[:raw_metadata]
+    }
+  end
+end
diff --git a/spec/lib/gitlab/gl_repository/repo_type_spec.rb b/spec/lib/gitlab/gl_repository/repo_type_spec.rb
index f06a2448ff7..9e09e1411ab 100644
--- a/spec/lib/gitlab/gl_repository/repo_type_spec.rb
+++ b/spec/lib/gitlab/gl_repository/repo_type_spec.rb
@@ -4,36 +4,6 @@ require 'spec_helper'
 describe Gitlab::GlRepository::RepoType do
   set(:project) { create(:project) }
 
-  shared_examples 'a repo type' do
-    describe "#identifier_for_subject" do
-      subject { described_class.identifier_for_subject(project) }
-
-      it { is_expected.to eq(expected_identifier) }
-    end
-
-    describe "#fetch_id" do
-      it "finds an id match in the identifier" do
-        expect(described_class.fetch_id(expected_identifier)).to eq(expected_id)
-      end
-
-      it 'does not break on other identifiers' do
-        expect(described_class.fetch_id("wiki-noid")).to eq(nil)
-      end
-    end
-
-    describe "#path_suffix" do
-      subject { described_class.path_suffix }
-
-      it { is_expected.to eq(expected_suffix) }
-    end
-
-    describe "#repository_for" do
-      it "finds the repository for the repo type" do
-        expect(described_class.repository_for(project)).to eq(expected_repository)
-      end
-    end
-  end
-
   describe Gitlab::GlRepository::PROJECT do
     it_behaves_like 'a repo type' do
       let(:expected_identifier) { "project-#{project.id}" }
diff --git a/spec/migrations/update_cs_vulnerability_confidence_column_spec.rb b/spec/migrations/update_cs_vulnerability_confidence_column_spec.rb
new file mode 100644
index 00000000000..b8575dd9467
--- /dev/null
+++ b/spec/migrations/update_cs_vulnerability_confidence_column_spec.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20190909141517_update_cs_vulnerability_confidence_column.rb')
+
+describe UpdateCsVulnerabilityConfidenceColumn, :migration, :sidekiq do
+  let(:vulnerabilities) { table(:vulnerability_occurrences) }
+  let(:identifiers) { table(:vulnerability_identifiers) }
+  let(:scanners) { table(:vulnerability_scanners) }
+  let(:projects) { table(:projects) }
+  let(:vul1) { attributes_for(:vulnerabilities_occurrence, id: 1, report_type: 2, confidence: 5) }
+  let(:vul2) { attributes_for(:vulnerabilities_occurrence, id: 2, report_type: 2, confidence: 5) }
+
+  before do
+    stub_const("#{described_class}::BATCH_SIZE", 2)
+  end
+
+  it 'updates confidence levels for container scanning reports' do
+    projects.create!(id: 123, namespace_id: 12, name: 'gitlab', path: 'gitlab')
+
+    identifiers.create!(id: 1,
+                        project_id: 123,
+                        fingerprint: 'd432c2ad2953e8bd587a3a43b3ce309b5b0154c2',
+                        external_type: 'SECURITY_ID',
+                        external_id: 'SECURITY_0',
+                        name: 'SECURITY_IDENTIFIER 0')
+
+    identifiers.create!(id: 2,
+                        project_id: 123,
+                        fingerprint: 'd432c2ad2953e8bd587a3a43b3ce309b5b0154c3',
+                        external_type: 'SECURITY_ID',
+                        external_id: 'SECURITY_0',
+                        name: 'SECURITY_IDENTIFIER 0')
+
+    scanners.create!(id: 6, project_id: 123, external_id: 'clair', name: 'Security Scanner')
+
+    vulnerabilities.create!(id: vul1[:id],
+                            severity: 2,
+                            confidence: 5,
+                            report_type: 2,
+                            project_id: 123,
+                            scanner_id: 6,
+                            primary_identifier_id: 1,
+                            project_fingerprint: vul1[:project_fingerprint],
+                            location_fingerprint: vul1[:location_fingerprint],
+                            uuid: vul1[:uuid],
+                            name: vul1[:name],
+                            metadata_version: '1.3',
+                            raw_metadata: vul1[:raw_metadata])
+
+    vulnerabilities.create!(id: vul2[:id],
+                            severity: 2,
+                            confidence: 5,
+                            report_type: 2,
+                            project_id: 123,
+                            scanner_id: 6,
+                            primary_identifier_id: 2,
+                            project_fingerprint: vul2[:project_fingerprint],
+                            location_fingerprint: vul2[:location_fingerprint],
+                            uuid: vul2[:uuid],
+                            name: vul2[:name],
+                            metadata_version: '1.3',
+                            raw_metadata: vul2[:raw_metadata])
+
+    expect(vulnerabilities.where(report_type: 2, confidence: 2).count). to eq(0)
+    expect(vulnerabilities.exists?(report_type: 2, confidence: 5)).to be_truthy
+
+    migrate!
+
+    expect(vulnerabilities.exists?(report_type: 2, confidence: 5)).to be_falsy
+    expect(vulnerabilities.where(report_type: 2, confidence: 2).count). to eq(2)
+  end
+end
diff --git a/spec/support/shared_examples/repo_type_shared_examples.rb b/spec/support/shared_examples/repo_type_shared_examples.rb
new file mode 100644
index 00000000000..dc9e3a73346
--- /dev/null
+++ b/spec/support/shared_examples/repo_type_shared_examples.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+shared_examples 'a repo type' do
+  describe "#identifier_for_subject" do
+    subject { described_class.identifier_for_subject(project) }
+
+    it { is_expected.to eq(expected_identifier) }
+  end
+
+  describe "#fetch_id" do
+    it "finds an id match in the identifier" do
+      expect(described_class.fetch_id(expected_identifier)).to eq(expected_id)
+    end
+
+    it 'does not break on other identifiers' do
+      expect(described_class.fetch_id("wiki-noid")).to eq(nil)
+    end
+  end
+
+  describe "#path_suffix" do
+    subject { described_class.path_suffix }
+
+    it { is_expected.to eq(expected_suffix) }
+  end
+
+  describe "#repository_for" do
+    it "finds the repository for the repo type" do
+      expect(described_class.repository_for(project)).to eq(expected_repository)
+    end
+  end
+end