diff --git a/src/components/Button.svelte b/src/components/Button.svelte
index c4d766174..aeda1b786 100644
--- a/src/components/Button.svelte
+++ b/src/components/Button.svelte
@@ -16,6 +16,7 @@
 
   export let autofocus: boolean = false;
   export let disabled: boolean = false;
+  export let notAllowed: boolean = true;
 
   export let styleFontFamily: string | undefined = undefined;
   export let stylePadding: string | undefined = undefined;
@@ -40,9 +41,11 @@
   }
 
   button:disabled {
-    cursor: not-allowed;
     color: var(--color-foreground-disabled);
   }
+  button:disabled.not-allowed {
+    cursor: not-allowed;
+  }
 
   .small {
     height: var(--button-tiny-height);
@@ -214,6 +217,7 @@
   on:mouseout
   on:mouseover
   class:disabled
+  class:not-allowed={notAllowed}
   class:small={size === "small"}
   class:regular={size === "regular"}
   class:large={size === "large"}
diff --git a/src/components/HoverPopover.svelte b/src/components/HoverPopover.svelte
index 525d6c05e..672bc9b1b 100644
--- a/src/components/HoverPopover.svelte
+++ b/src/components/HoverPopover.svelte
@@ -27,7 +27,7 @@
     box-shadow: var(--elevation-low);
     position: relative;
     right: 1rem;
-    z-index: 1;
+    z-index: 10;
   }
 </style>
 
diff --git a/src/components/Markdown.svelte b/src/components/Markdown.svelte
index a00e17814..608b428eb 100644
--- a/src/components/Markdown.svelte
+++ b/src/components/Markdown.svelte
@@ -138,7 +138,6 @@
       const preElement = node.parentElement as HTMLElement;
       const copyButton = document.createElement("radicle-clipboard");
       copyButton.setAttribute("text", node.textContent || "");
-      copyButton.setAttribute("small", "");
       preElement.prepend(copyButton);
 
       const className = Array.from(node.classList).find(name =>
diff --git a/src/views/projects/Source/BranchSelector.svelte b/src/views/projects/Source/BranchSelector.svelte
index 875a47067..32634f370 100644
--- a/src/views/projects/Source/BranchSelector.svelte
+++ b/src/views/projects/Source/BranchSelector.svelte
@@ -11,6 +11,7 @@
   import IconSmall from "@app/components/IconSmall.svelte";
   import Link from "@app/components/Link.svelte";
   import Button from "@app/components/Button.svelte";
+  import HoverPopover from "@app/components/HoverPopover.svelte";
 
   export let branches: Array<{ name: string; route: Route }>;
   export let node: BaseUrl;
@@ -35,39 +36,66 @@
   }
 </style>
 
-<div class="branch" title="Current branch">
+<div class="branch">
   {#if selectedBranch}
-    <Popover
-      popoverPadding="0"
-      popoverPositionTop="2.5rem"
-      popoverBorderRadius="var(--border-radius-small)">
-      <Button
-        variant="outline"
-        let:expanded
-        let:toggle
-        on:click={toggle}
-        slot="toggle"
-        styleBorderRadius="var(--border-radius-tiny) 0 0 var(--border-radius-tiny)"
-        title="Change branch"
-        disabled={hideDropdown}>
-        <IconSmall name="branch" />
-        <div class="identifier">{selectedBranch}</div>
-        <IconSmall name={expanded ? "chevron-up" : "chevron-down"} />
-      </Button>
+    {#if hideDropdown}
+      <HoverPopover popoverPositionLeft="0" popoverPositionTop="0.5rem">
+        <Button
+          ariaLabel="canonical-branch"
+          variant="outline"
+          styleBorderRadius="var(--border-radius-tiny) 0 0 var(--border-radius-tiny)"
+          slot="toggle"
+          disabled
+          notAllowed={false}>
+          <IconSmall name="branch" />
+          <div class="identifier">{project.defaultBranch}</div>
+        </Button>
+        <div
+          class="txt-small"
+          style:padding="0.5rem 0.5rem 0.5rem 0.75rem"
+          slot="popover">
+          <div style:margin-bottom="1rem">
+            You are currently browsing the canonical branch.
+          </div>
+          <div>If you want to browse a specific branch,</div>
+          <div>you need to select the desired remote first.</div>
+        </div>
+      </HoverPopover>
+    {:else}
+      <Popover
+        popoverPadding="0"
+        popoverPositionTop="2.5rem"
+        popoverBorderRadius="var(--border-radius-small)">
+        <Button
+          variant="outline"
+          let:expanded
+          let:toggle
+          on:click={toggle}
+          slot="toggle"
+          styleBorderRadius="var(--border-radius-tiny) 0 0 var(--border-radius-tiny)"
+          title="Change branch"
+          disabled={hideDropdown}>
+          <IconSmall name="branch" />
+          <div class="identifier">{selectedBranch}</div>
+          <IconSmall
+            name={hideDropdown && expanded ? "chevron-up" : "chevron-down"} />
+        </Button>
 
-      <DropdownList slot="popover" items={branches}>
-        <svelte:fragment slot="item" let:item>
-          <Link route={item.route} on:afterNavigate={() => closeFocused()}>
-            <DropdownListItem selected={item.name === selectedBranch}>
-              <div class="identifier">{item.name}</div>
-            </DropdownListItem>
-          </Link>
-        </svelte:fragment>
-      </DropdownList>
-    </Popover>
+        <DropdownList slot="popover" items={branches}>
+          <svelte:fragment slot="item" let:item>
+            <Link route={item.route} on:afterNavigate={() => closeFocused()}>
+              <DropdownListItem selected={item.name === selectedBranch}>
+                <div class="identifier">{item.name}</div>
+              </DropdownListItem>
+            </Link>
+          </svelte:fragment>
+        </DropdownList>
+      </Popover>
+    {/if}
   {/if}
 
   <Button
+    title="Current HEAD"
     variant={selectedBranch ? "gray" : "outline"}
     styleBorderRadius={selectedBranch
       ? "0 var(--border-radius-tiny) var(--border-radius-tiny) 0"
diff --git a/src/views/projects/Source/Header.svelte b/src/views/projects/Source/Header.svelte
index 000c87c36..a599b9f21 100644
--- a/src/views/projects/Source/Header.svelte
+++ b/src/views/projects/Source/Header.svelte
@@ -11,6 +11,7 @@
   import Link from "@app/components/Link.svelte";
   import Button from "@app/components/Button.svelte";
   import Radio from "@app/components/Radio.svelte";
+  import HoverPopover from "@app/components/HoverPopover.svelte";
 
   export let node: BaseUrl;
   export let branches: Array<{ name: string; route: Route }>;
@@ -100,11 +101,20 @@
     </Link>
   </Radio>
 
-  <Button disabled variant="outline">
-    <IconSmall name="user" />
-    <div>
-      {tree.stats.contributors}
-      {pluralize("contributor", tree.stats.contributors)}
+  <HoverPopover popoverPositionLeft="0" popoverPositionTop="0.5rem">
+    <Button disabled notAllowed={false} variant="outline" slot="toggle">
+      <IconSmall name="user" />
+      <div>
+        {tree.stats.contributors}
+        {pluralize("contributor", tree.stats.contributors)}
+      </div>
+    </Button>
+    <div
+      class="txt-small"
+      style:padding="0.5rem 0.5rem 0.5rem 0.75rem"
+      slot="popover">
+      <div style:margin-bottom="1rem">Coming soon.</div>
+      <div>Listing all contributors is not yet implemented.</div>
     </div>
-  </Button>
+  </HoverPopover>
 </div>
diff --git a/tests/e2e/project.spec.ts b/tests/e2e/project.spec.ts
index 820dd35fd..032df3dcb 100644
--- a/tests/e2e/project.spec.ts
+++ b/tests/e2e/project.spec.ts
@@ -49,8 +49,9 @@ test("navigate to project", async ({ page }) => {
 
   // Project menu shows default selected branch and commit and contributor counts.
   {
-    await expect(page.getByTitle("Current branch")).toContainText(
-      `main ${aliceMainHead.substring(0, 7)}`,
+    await expect(page.getByLabel("canonical-branch")).toBeVisible();
+    await expect(page.getByTitle("Current HEAD")).toHaveText(
+      aliceMainHead.substring(0, 7),
     );
     await expectCounts({ commits: 6, contributors: 1 }, page);
   }
@@ -79,7 +80,7 @@ test("show source tree at specific revision", async ({ page }) => {
     })
     .click();
 
-  await expect(page.getByTitle("Current branch")).toContainText("335dd6d");
+  await expect(page.getByTitle("Current HEAD")).toContainText("335dd6d");
   await expect(page.locator(".source-tree")).toHaveText("bin src");
   await expectCounts({ commits: 2, contributors: 1 }, page);
 });
@@ -294,8 +295,9 @@ test("peer and branch switching", async ({ page }) => {
 
     // Default `main` branch.
     {
-      await expect(page.getByTitle("Current branch")).toContainText(
-        `main ${aliceMainHead.substring(0, 7)}`,
+      await expect(page.getByTitle("Change branch")).toHaveText("main");
+      await expect(page.getByTitle("Current HEAD")).toHaveText(
+        aliceMainHead.substring(0, 7),
       );
       await expectCounts({ commits: 6, contributors: 1 }, page);
     }
@@ -305,9 +307,10 @@ test("peer and branch switching", async ({ page }) => {
       await page.getByTitle("Change branch").click();
       await page.getByText("feature/branch").click();
 
-      await expect(page.getByTitle("Current branch")).toContainText(
-        "feature/branch 1aded56",
-      );
+      await expect(
+        page.getByRole("button", { name: "feature/branch" }),
+      ).toBeVisible();
+      await expect(page.getByTitle("Current HEAD")).toHaveText("1aded56");
       await expectCounts({ commits: 9, contributors: 1 }, page);
     }
 
@@ -316,9 +319,10 @@ test("peer and branch switching", async ({ page }) => {
       await page.getByTitle("Change branch").click();
       await page.getByText("orphaned-branch").click();
 
-      await expect(page.getByTitle("Current branch")).toContainText(
-        "orphaned-branch af3641c",
-      );
+      await expect(
+        page.getByRole("button", { name: "orphaned-branch" }),
+      ).toBeVisible();
+      await expect(page.getByTitle("Current HEAD")).toHaveText("af3641c");
       await expectCounts({ commits: 1, contributors: 1 }, page);
 
       await expect(page.getByText("No files at this revision")).toBeVisible();
@@ -332,8 +336,9 @@ test("peer and branch switching", async ({ page }) => {
     await expect(page.getByTitle("Change peer")).not.toContainText("alice");
     await expect(page.getByTitle("Change peer")).not.toContainText("bob");
 
-    await expect(page.getByTitle("Current branch")).toContainText(
-      `main ${aliceMainHead.substring(0, 7)}`,
+    await expect(page.getByLabel("canonical-branch")).toBeVisible();
+    await expect(page.getByTitle("Current HEAD")).toHaveText(
+      aliceMainHead.substring(0, 7),
     );
     await expect(page.getByText("Git test repository")).toBeVisible();
   }
@@ -347,8 +352,9 @@ test("peer and branch switching", async ({ page }) => {
 
     // Default `main` branch.
     {
-      await expect(page.getByTitle("Current branch")).toContainText(
-        `main ${bobHead.substring(0, 7)}`,
+      await expect(page.getByLabel("canonical-branch")).toBeVisible();
+      await expect(page.getByTitle("Current HEAD")).toHaveText(
+        bobHead.substring(0, 7),
       );
       await expectCounts({ commits: 7, contributors: 2 }, page);
       await expect(
diff --git a/tests/e2e/project/assignees.spec.ts b/tests/e2e/project/assignees.spec.ts
index 1c95f4fd5..7d1cdfdcd 100644
--- a/tests/e2e/project/assignees.spec.ts
+++ b/tests/e2e/project/assignees.spec.ts
@@ -52,7 +52,6 @@ test("add and remove assignees", async ({ page, authenticatedPeer }) => {
   await expect(
     page.getByRole("button", { name: "save assignees" }),
   ).toBeHidden();
-  await page.reload();
   await expect(
     page.getByRole("button", { name: "avatar did:key:z6MktU…1xB22S" }),
   ).toBeVisible();
@@ -71,7 +70,6 @@ test("add and remove assignees", async ({ page, authenticatedPeer }) => {
   await expect(
     page.getByRole("button", { name: "save assignees" }),
   ).toBeHidden();
-  await page.reload();
   await expect(
     page.getByRole("button", { name: "avatar did:key:z6Mkkf…XVsVz5" }),
   ).toBeVisible();
diff --git a/tests/e2e/project/commit.spec.ts b/tests/e2e/project/commit.spec.ts
index d113c0d21..5f7b2e497 100644
--- a/tests/e2e/project/commit.spec.ts
+++ b/tests/e2e/project/commit.spec.ts
@@ -114,7 +114,7 @@ test("navigation to source tree at specific revision", async ({ page }) => {
   await expect(page).toHaveURL(
     `${sourceBrowsingUrl}/tree/0801aceeab500033f8d608778218657bd626ef73/deep/directory/hierarchy/is/entirely/possible/in/git/repositories/.gitkeep`,
   );
-  await expect(page.getByTitle("Current branch")).toContainText("0801ace");
+  await expect(page.getByTitle("Current HEAD")).toContainText("0801ace");
   await expect(page.locator(".source-tree >> text=.gitkeep")).toBeVisible();
   await expect(
     page.locator(
diff --git a/tests/e2e/project/commits.spec.ts b/tests/e2e/project/commits.spec.ts
index 0bc652498..dc1244e25 100644
--- a/tests/e2e/project/commits.spec.ts
+++ b/tests/e2e/project/commits.spec.ts
@@ -38,18 +38,18 @@ test("peer and branch switching", async ({ page }) => {
     await page.getByTitle("Change branch").click();
     await page.getByText("feature/branch").click();
 
-    await expect(page.getByTitle("Current branch")).toContainText(
-      "feature/branch 1aded56",
-    );
+    await expect(
+      page.getByRole("button", { name: "feature/branch" }),
+    ).toBeVisible();
     await expect(page.getByText("Thursday, November 17, 2022")).toBeVisible();
     await expect(page.locator(".history .teaser")).toHaveCount(9);
 
     await page.getByTitle("Change branch").click();
     await page.getByText("orphaned-branch").click();
 
-    await expect(page.getByTitle("Current branch")).toContainText(
-      "orphaned-branch af3641c",
-    );
+    await expect(
+      page.getByRole("button", { name: "orphaned-branch" }),
+    ).toBeVisible();
     await expect(page.getByText("Thursday, November 17, 2022")).toBeVisible();
     await expect(page.locator(".list")).toHaveCount(1);
   }
@@ -146,7 +146,9 @@ test("pushing changes while viewing history", async ({ page, peerManager }) => {
   await page.reload();
   await expect(page).toHaveURL(`${alice.uiUrl()}/${rid}/history`);
   await expect(page.getByRole("link", { name: "2 commits" })).toBeVisible();
-  await expect(page.getByTitle("Current branch")).toContainText("main 516fa74");
+
+  await expect(page.getByLabel("canonical-branch")).toHaveText("main");
+  await expect(page.getByTitle("Current HEAD")).toHaveText("516fa74");
 
   await page.getByText("alice-project").click();
   await expect(page).toHaveURL(`${alice.uiUrl()}/${rid}`);
@@ -171,5 +173,6 @@ test("pushing changes while viewing history", async ({ page, peerManager }) => {
   await expect(page.getByRole("link", { name: "3 commits" })).toHaveText(
     "3 commits",
   );
-  await expect(page.getByTitle("Current branch")).toContainText("main bb9089a");
+  await expect(page.getByLabel("canonical-branch")).toHaveText("main");
+  await expect(page.getByTitle("Current HEAD")).toHaveText("bb9089a");
 });
diff --git a/tests/support/project.ts b/tests/support/project.ts
index 2e39deac1..2a6219329 100644
--- a/tests/support/project.ts
+++ b/tests/support/project.ts
@@ -58,7 +58,6 @@ export async function expectThreadCommentingToWork(page: Page) {
   await page.getByPlaceholder("Leave your comment").fill("This is a comment");
   await page.getByRole("button", { name: "Comment" }).click();
   await expect(page.getByLabel("extended-textarea")).toBeHidden();
-  await page.reload();
   await expect(page.getByText("This is a comment")).toBeVisible();
 
   await page.getByRole("button", { name: "edit comment" }).first().click();
@@ -67,14 +66,12 @@ export async function expectThreadCommentingToWork(page: Page) {
     .fill("This is an edited comment");
   await page.getByRole("button", { name: "Save" }).click();
   await expect(page.getByLabel("extended-textarea")).toBeHidden();
-  await page.reload();
   await expect(page.getByText("This is an edited comment")).toBeVisible();
 
   await page.getByRole("button", { name: "Reply to comment" }).click();
   await page.getByPlaceholder("Reply to comment").fill("This is a reply");
   await page.getByRole("button", { name: "Comment", exact: true }).click();
   await expect(page.getByLabel("extended-textarea")).toBeHidden();
-  await page.reload();
   await expect(page.getByText("This is a reply")).toBeVisible();
 
   await page.getByRole("button", { name: "edit comment" }).nth(1).click();
@@ -83,7 +80,6 @@ export async function expectThreadCommentingToWork(page: Page) {
     .fill("This is an edited reply");
   await page.getByRole("button", { name: "Save" }).click();
   await expect(page.getByLabel("extended-textarea")).toBeHidden();
-  await page.reload();
   await expect(page.getByText("This is an edited reply")).toBeVisible();
 }
 
@@ -108,7 +104,6 @@ export async function expectLabelEditingToWork(page: Page) {
   await page.keyboard.press("Enter");
   await page.getByRole("button", { name: "save labels" }).click();
   await expect(page.getByRole("button", { name: "save labels" })).toBeHidden();
-  await page.reload();
   await expect(page.getByRole("button", { name: "bug" })).toBeVisible();
   await expect(
     page.getByRole("button", { name: "documentation" }),
@@ -122,7 +117,6 @@ export async function expectLabelEditingToWork(page: Page) {
     .click();
   await page.getByRole("button", { name: "save labels" }).click();
   await expect(page.getByRole("button", { name: "save labels" })).toBeHidden();
-  await page.reload();
   await expect(page.getByRole("button", { name: "bug" })).toBeVisible();
 }