diff --git a/polygerrit-ui/app/elements/core/gr-router/gr-router.ts b/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
index 36bbfa4..94467b5 100644
--- a/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
+++ b/polygerrit-ui/app/elements/core/gr-router/gr-router.ts
@@ -169,17 +169,6 @@
   // Matches /admin/repos/<repos>,access.
   REPO_DASHBOARDS: /^\/admin\/repos\/(.+),dashboards$/,
 
-  // Matches /admin/repos/<repo>,branches[,<offset>].
-  BRANCH_LIST_OFFSET: /^\/admin\/repos\/(.+),branches(,(.+))?$/,
-  BRANCH_LIST_FILTER: '/admin/repos/:repo,branches/q/filter::filter',
-  BRANCH_LIST_FILTER_OFFSET:
-    '/admin/repos/:repo,branches/q/filter::filter,:offset',
-
-  // Matches /admin/repos/<repo>,tags[,<offset>].
-  TAG_LIST_OFFSET: /^\/admin\/repos\/(.+),tags(,(.+))?$/,
-  TAG_LIST_FILTER: '/admin/repos/:repo,tags/q/filter::filter',
-  TAG_LIST_FILTER_OFFSET: '/admin/repos/:repo,tags/q/filter::filter,:offset',
-
   PLUGINS: /^\/plugins\/(.+)$/,
 
   // Matches /admin/plugins with optional filter and offset.
@@ -188,6 +177,11 @@
   GROUP_LIST: /^\/admin\/groups\/?(?:\/q\/filter:(.*?))?(?:,(\d+))?$/,
   // Matches /admin/repos with optional filter and offset.
   REPO_LIST: /^\/admin\/repos\/?(?:\/q\/filter:(.*?))?(?:,(\d+))?$/,
+  // Matches /admin/repos/$REPO,branches with optional filter and offset.
+  BRANCH_LIST:
+    /^\/admin\/repos\/(.+),branches\/?(?:\/q\/filter:(.*?))?(?:,(\d+))?$/,
+  // Matches /admin/repos/$REPO,tags with optional filter and offset.
+  TAG_LIST: /^\/admin\/repos\/(.+),tags\/?(?:\/q\/filter:(.*?))?(?:,(\d+))?$/,
 
   QUERY: /^\/q\/([^,]+)(,(\d+))?$/,
 
@@ -738,40 +732,12 @@
       ctx => this.handleRepoDashboardsRoute(ctx)
     );
 
-    this.mapRoute(
-      RoutePattern.BRANCH_LIST_OFFSET,
-      'handleBranchListOffsetRoute',
-      ctx => this.handleBranchListOffsetRoute(ctx)
+    this.mapRoute(RoutePattern.BRANCH_LIST, 'handleBranchListRoute', ctx =>
+      this.handleBranchListRoute(ctx)
     );
 
-    this.mapRoute(
-      RoutePattern.BRANCH_LIST_FILTER_OFFSET,
-      'handleBranchListFilterOffsetRoute',
-      ctx => this.handleBranchListFilterOffsetRoute(ctx)
-    );
-
-    this.mapRoute(
-      RoutePattern.BRANCH_LIST_FILTER,
-      'handleBranchListFilterRoute',
-      ctx => this.handleBranchListFilterRoute(ctx)
-    );
-
-    this.mapRoute(
-      RoutePattern.TAG_LIST_OFFSET,
-      'handleTagListOffsetRoute',
-      ctx => this.handleTagListOffsetRoute(ctx)
-    );
-
-    this.mapRoute(
-      RoutePattern.TAG_LIST_FILTER_OFFSET,
-      'handleTagListFilterOffsetRoute',
-      ctx => this.handleTagListFilterOffsetRoute(ctx)
-    );
-
-    this.mapRoute(
-      RoutePattern.TAG_LIST_FILTER,
-      'handleTagListFilterRoute',
-      ctx => this.handleTagListFilterRoute(ctx)
+    this.mapRoute(RoutePattern.TAG_LIST, 'handleTagListRoute', ctx =>
+      this.handleTagListRoute(ctx)
     );
 
     this.mapRoute(
@@ -1207,78 +1173,26 @@
     this.reporting.setRepoName(repo);
   }
 
-  handleBranchListOffsetRoute(ctx: PageContext) {
+  handleBranchListRoute(ctx: PageContext) {
     const state: RepoViewState = {
       view: GerritView.REPO,
       detail: RepoDetailView.BRANCHES,
       repo: ctx.params[0] as RepoName,
       offset: ctx.params[2] ?? '0',
-      filter: null,
+      filter: ctx.params[1] ?? null,
     };
     // Note that router model view must be updated before view models.
     this.setState(state);
     this.repoViewModel.setState(state);
   }
 
-  handleBranchListFilterOffsetRoute(ctx: PageContext) {
-    const state: RepoViewState = {
-      view: GerritView.REPO,
-      detail: RepoDetailView.BRANCHES,
-      repo: ctx.params['repo'] as RepoName,
-      offset: ctx.params['offset'] ?? '0',
-      filter: ctx.params['filter'] ?? null,
-    };
-    // Note that router model view must be updated before view models.
-    this.setState(state);
-    this.repoViewModel.setState(state);
-  }
-
-  handleBranchListFilterRoute(ctx: PageContext) {
-    const state: RepoViewState = {
-      view: GerritView.REPO,
-      detail: RepoDetailView.BRANCHES,
-      repo: ctx.params['repo'] as RepoName,
-      filter: ctx.params['filter'] ?? null,
-      offset: '0',
-    };
-    // Note that router model view must be updated before view models.
-    this.setState(state);
-    this.repoViewModel.setState(state);
-  }
-
-  handleTagListOffsetRoute(ctx: PageContext) {
+  handleTagListRoute(ctx: PageContext) {
     const state: RepoViewState = {
       view: GerritView.REPO,
       detail: RepoDetailView.TAGS,
       repo: ctx.params[0] as RepoName,
       offset: ctx.params[2] ?? '0',
-      filter: null,
-    };
-    // Note that router model view must be updated before view models.
-    this.setState(state);
-    this.repoViewModel.setState(state);
-  }
-
-  handleTagListFilterOffsetRoute(ctx: PageContext) {
-    const state: RepoViewState = {
-      view: GerritView.REPO,
-      detail: RepoDetailView.TAGS,
-      repo: ctx.params['repo'] as RepoName,
-      offset: ctx.params['offset'] ?? '0',
-      filter: ctx.params['filter'],
-    };
-    // Note that router model view must be updated before view models.
-    this.setState(state);
-    this.repoViewModel.setState(state);
-  }
-
-  handleTagListFilterRoute(ctx: PageContext) {
-    const state: RepoViewState = {
-      view: GerritView.REPO,
-      detail: RepoDetailView.TAGS,
-      repo: ctx.params['repo'] as RepoName,
-      offset: '0',
-      filter: ctx.params['filter'] ?? null,
+      filter: ctx.params[1] ?? null,
     };
     // Note that router model view must be updated before view models.
     this.setState(state);
diff --git a/polygerrit-ui/app/elements/core/gr-router/gr-router_test.ts b/polygerrit-ui/app/elements/core/gr-router/gr-router_test.ts
index c9eb52e..6cad45c 100644
--- a/polygerrit-ui/app/elements/core/gr-router/gr-router_test.ts
+++ b/polygerrit-ui/app/elements/core/gr-router/gr-router_test.ts
@@ -165,9 +165,7 @@
     assert.deepEqual(actualRequiresAuth, shouldRequireAutoAuth);
 
     const unauthenticatedHandlers = [
-      'handleBranchListFilterOffsetRoute',
-      'handleBranchListFilterRoute',
-      'handleBranchListOffsetRoute',
+      'handleBranchListRoute',
       'handleChangeIdQueryRoute',
       'handleChangeNumberLegacyRoute',
       'handleChangeRoute',
@@ -193,9 +191,7 @@
       'handleQueryLegacySuffixRoute',
       'handleQueryRoute',
       'handleRegisterRoute',
-      'handleTagListFilterOffsetRoute',
-      'handleTagListFilterRoute',
-      'handleTagListOffsetRoute',
+      'handleTagListRoute',
       'handlePluginScreen',
     ];
 
@@ -682,72 +678,66 @@
         });
       });
 
-      suite('BRANCH_LIST_*', () => {
-        test('BRANCH_LIST_OFFSET', async () => {
-          // BRANCH_LIST_OFFSET: /^\/admin\/repos\/(.+),branches(,(.+))?$/,
-          await checkUrlToState('/admin/repos/4321,branches', {
-            ...createRepoBranchesViewState(),
-            repo: '4321' as RepoName,
-          });
-          await checkUrlToState('/admin/repos/4321,branches,42', {
-            ...createRepoBranchesViewState(),
-            repo: '4321' as RepoName,
-            offset: '42',
-          });
+      test('BRANCH_LIST', async () => {
+        await checkUrlToState('/admin/repos/4321,branches', {
+          ...createRepoBranchesViewState(),
+          repo: '4321' as RepoName,
         });
-
-        test('BRANCH_LIST_FILTER_OFFSET', async () => {
-          // BRANCH_LIST_FILTER_OFFSET: '/admin/repos/:repo,branches/q/filter::filter,:offset',
-          await checkUrlToState('/admin/repos/4321,branches/q/filter:foo,42', {
-            ...createRepoBranchesViewState(),
-            repo: '4321' as RepoName,
-            offset: '42',
-            filter: 'foo',
-          });
+        await checkUrlToState('/admin/repos/4321,branches,42', {
+          ...createRepoBranchesViewState(),
+          repo: '4321' as RepoName,
+          offset: '42',
         });
-
-        test('BRANCH_LIST_FILTER', async () => {
-          // BRANCH_LIST_FILTER: '/admin/repos/:repo,branches/q/filter::filter',
-          await checkUrlToState('/admin/repos/4321,branches/q/filter:foo', {
-            ...createRepoBranchesViewState(),
-            repo: '4321' as RepoName,
-            filter: 'foo',
-          });
+        await checkUrlToState('/admin/repos/4321,branches/q/filter:foo,42', {
+          ...createRepoBranchesViewState(),
+          repo: '4321' as RepoName,
+          offset: '42',
+          filter: 'foo',
         });
+        await checkUrlToState('/admin/repos/4321,branches/q/filter:foo', {
+          ...createRepoBranchesViewState(),
+          repo: '4321' as RepoName,
+          filter: 'foo',
+        });
+        await checkUrlToState(
+          '/admin/repos/asdf/%2F%20%2525%252Fqwer,branches/q/filter:foo/%2F%20%2525%252F',
+          {
+            ...createRepoBranchesViewState(),
+            repo: 'asdf// %/qwer' as RepoName,
+            filter: 'foo// %/',
+          }
+        );
       });
 
-      suite('TAG_LIST_*', () => {
-        test('TAG_LIST_OFFSET', async () => {
-          // TAG_LIST_OFFSET: /^\/admin\/repos\/(.+),tags(,(.+))?$/,
-          await checkUrlToState('/admin/repos/4321,tags', {
-            ...createRepoTagsViewState(),
-            repo: '4321' as RepoName,
-          });
-          await checkUrlToState('/admin/repos/4321,tags,42', {
-            ...createRepoTagsViewState(),
-            repo: '4321' as RepoName,
-            offset: '42',
-          });
+      test('TAG_LIST', async () => {
+        await checkUrlToState('/admin/repos/4321,tags', {
+          ...createRepoTagsViewState(),
+          repo: '4321' as RepoName,
         });
-
-        test('TAG_LIST_FILTER_OFFSET', async () => {
-          // TAG_LIST_FILTER_OFFSET: '/admin/repos/:repo,tags/q/filter::filter,:offset',
-          await checkUrlToState('/admin/repos/4321,tags/q/filter:foo,42', {
-            ...createRepoTagsViewState(),
-            repo: '4321' as RepoName,
-            offset: '42',
-            filter: 'foo',
-          });
+        await checkUrlToState('/admin/repos/4321,tags,42', {
+          ...createRepoTagsViewState(),
+          repo: '4321' as RepoName,
+          offset: '42',
         });
-
-        test('TAG_LIST_FILTER', async () => {
-          // TAG_LIST_FILTER: '/admin/repos/:repo,tags/q/filter::filter',
-          await checkUrlToState('/admin/repos/4321,tags/q/filter:foo', {
-            ...createRepoTagsViewState(),
-            repo: '4321' as RepoName,
-            filter: 'foo',
-          });
+        await checkUrlToState('/admin/repos/4321,tags/q/filter:foo,42', {
+          ...createRepoTagsViewState(),
+          repo: '4321' as RepoName,
+          offset: '42',
+          filter: 'foo',
         });
+        await checkUrlToState('/admin/repos/4321,tags/q/filter:foo', {
+          ...createRepoTagsViewState(),
+          repo: '4321' as RepoName,
+          filter: 'foo',
+        });
+        await checkUrlToState(
+          '/admin/repos/asdf/%2F%20%2525%252Fqwer,tags/q/filter:foo/%2F%20%2525%252F',
+          {
+            ...createRepoTagsViewState(),
+            repo: 'asdf// %/qwer' as RepoName,
+            filter: 'foo// %/',
+          }
+        );
       });
 
       test('REPO_LIST', async () => {