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Widget Reference

Reference for UInternetBrowser and shipped tab Blueprints under InternetBrowserUMG/. C++ API verified from plugin source (v5.8) and Unreal MCP.

Class diagram

flowchart TB
  Parent["«parent» UWidget"]
  Browser["UInternetBrowser<br/>InitialURL · bSupportsTransparency · bShowWhitelistOnly · bEnableHistory · bOnlyHTTPS · WhitelistWebsites · Bookmarks<br/>LoadURL() · InitializeInternetBrowser() · ExecuteJavascript() · AddBookmark() · GetHistory()"]
  Shell["WBP_InternetBrowser<br/>CurrentTabButton · InitialURL · CurrentBookmarks<br/>AddNewTab() · SwitchTab() · CloseTab()"]
  Content["WBP_InternetBrowserContent<br/>ParentBrowser · InitialURL<br/>LoadURL() · GetInternetBrowserWidget()"]

  Parent --> Browser
  Shell -->|manages tabs| Content
  Content -->|hosts| Browser

Structs

FBrowserBookmark

Field	Type
Title	Text
URL	Text

FInternetBrowserHistory

Field	Type
Title	Text
URL	Text
Date And Time	DateTime

Use Is History Valid to test entries.

FBrowserCookie

Field	Type
Name, Value, Domain, Path	String
Https Requests Only, Http Request Only, Expires	Boolean
Expire Time	DateTime

Properties — UInternetBrowser

Property	Default	Description
Initial URL	—	Must include protocol (`https://`)
Support Transparency	—	Transparent browser background
Show Whitelist Only	—	Only Whitelist Websites load
Enable History	—	Record visited pages
Only HTTPS	—	Upgrade HTTP to HTTPS
Support Browser URLs	—	Custom `chrome://`-style protocols
Support localhost	—	Allow `127.0.0.1` / `localhost`
Whitelist Websites	Array	Allowed domains when whitelist on
Bookmarks	Array	Initial FBrowserBookmark entries
Internet Browser Save Game Class	Class	Optional persistence

Delegates (events)

Event	When
On Load Started	Navigation begins
On Load Completed	Page finished loading
On Load Error	Load failed
On Url Changed	Address changed
On Access Denied	Whitelist / policy block
On Before Popup	New window/tab requested
On Load Browser URL	Internal browser protocol link

UInternetBrowser — Blueprint functions

Function	Category	Description
Initialize Internet Browser	Browser	Wire back/forward/reload/address bar; load URL
Load URL	Browser	Navigate (auto-adds `https://` if missing)
Load String	Browser	Display HTML string
Execute Javascript	Browser	Run JS in current page
Get Url / Get Title Text / Get Addressbar Url	Browser	Query state
Get Clean Domain Name	Browser	Static — strip path from URL
Get Browser Protocol Link	Browser	Custom protocol prefix
Add Bookmark / Remove Bookmark / Get Bookmarks	Bookmark	Bookmark CRUD
Get History	Browser	Returns FInternetBrowserHistory array
Set Cookie / Set Cookie (All URLs)	Cookies	Async via delegate
Delete Cookie / Delete Cookie Database	Cookies	Async via delegate
Get Cookie Name	Cookies	Read cookie field

Assign Back Button, Forward Button, Reload Button, and Addressbar widget references before Initialize Internet Browser.

WBP_InternetBrowser (tab shell)

Variables: Current Tab Button, Initial URL, Current Bookmarks, On Tab Switch.

Function	Description
Add New Tab	Spawn tab + content
Switch Tab	Activate tab by button
Close Tab	Remove tab
Get Next Tab / Get Previous Tab	Keyboard navigation helpers
Enable Fullscreen	Toggle fullscreen for active tab
Add Bookmark To Browser Widgets / Remove Bookmark From Browser Widgets	Sync bookmarks across tabs

WBP_InternetBrowserContent (single tab)

Variables: Tab Button, Parent Browser, Initial URL.

Function	Description
Get Internet Browser Widget	Returns embedded UInternetBrowser
Load URL	Navigate this tab
Switch To Fullscreen	Fullscreen this tab
Refresh Bookmarks	Rebuild bookmark bar
Load History Widgets	Populate history panel
Remove Bookmark	Remove from bar
Toggle History Delete	Bulk delete mode
Set Browser Switch Index	Tab index for keyboard

Content paths

Item	Location
Content root	`InternetBrowserUMG/`
Tabbed UI	`WBP_InternetBrowser`
Demo	`DemoLevel`
Icons	`DefaultIcons/`

C++ module

PrivateDependencyModuleNames.AddRange(new string[] { "InternetBrowserUMG" });

#include "InternetBrowser.h"