diff --git a/src/driver/core/FileExplorer.ts b/src/driver/core/FileExplorer.ts
index 1325e1d..4248d6b 100644
--- a/src/driver/core/FileExplorer.ts
+++ b/src/driver/core/FileExplorer.ts
@@ -68,11 +68,18 @@ export const setUpTree: BoundMethodCreator<[
   })
 
   visibleNodesGenerator.init()
-
   tasksAfterRender.push(DOMHelper.focusSearchInput)
   dispatch.set({ state: 'done' })
-  const targetPath = platform.getCurrentPath(metaData.branchName)
-  if (targetPath) dispatch.call(goTo, targetPath)
+
+  if (platform.shouldExpandAll?.()) {
+    visibleNodesGenerator.visibleNodes.nodes.forEach(node =>
+      dispatch.call(toggleNodeExpansion, node, { skipScrollToNode: true, recursive: true }),
+    )
+    dispatch.call(updateVisibleNodes)
+  } else {
+    const targetPath = platform.getCurrentPath(metaData.branchName)
+    if (targetPath) dispatch.call(goTo, targetPath)
+  }
 }
 
 export const execAfterRender: BoundMethodCreator = dispatch => () => {
diff --git a/src/platforms/GitHub/index.ts b/src/platforms/GitHub/index.ts
index a4e81e0..d0b325d 100644
--- a/src/platforms/GitHub/index.ts
+++ b/src/platforms/GitHub/index.ts
@@ -203,6 +203,9 @@ export const GitHub: Platform = {
   shouldShow() {
     return Boolean(DOMHelper.isInCodePage() || URLHelper.isInPullPage())
   },
+  shouldExpandAll() {
+    return Boolean(URLHelper.isInPullPage())
+  },
   getCurrentPath(branchName) {
     return URLHelper.getCurrentPath(branchName)
   },
diff --git a/src/platforms/platform.d.ts b/src/platforms/platform.d.ts
index 1dfed0a..0dee955 100644
--- a/src/platforms/platform.d.ts
+++ b/src/platforms/platform.d.ts
@@ -7,6 +7,7 @@ type Platform = {
   ): Promise<Pick<MetaData, 'userUrl' | 'repoUrl' | 'defaultBranchName'>>
   getTreeData(metaData: MetaData, accessToken?: string): Promise<TreeNode>
   shouldShow(): boolean
+  shouldExpandAll?(): boolean
   getCurrentPath(branchName: string): string[] | null
   setOAuth(code: string): Promise<string | null>
   getOAuthLink(): string