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Brave Components
Mihai PLESA edited this page May 23, 2025
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Component extensions (or, more simply, components) allow Brave to receive asynchronous updates to core functionality without needing to update Brave itself. Currently, Brave uses components to download the data files associated with Ad Block, HTTPS Everywhere, Tracking Protection, Tor Client Updater and Widevine Content Decryption Module.
On startup, Brave installs its registered components via https://go-updater.brave.com/extensions. If already installed, Brave verifies that the components are up-to-date. Once installed/verified, Brave checks for new updates every 5 hours. The sponsored image components for NTP are checked for updates every 15 minutes (see kSIComponentUpdateCheckInterval here).
The actual binary download for the component comes from brave-core-ext.s3.brave.com. For more info please see Network requests in Brave.
To perform an on-demand update check of your installed components, visit brave://components/ in Brave and press the appropriate "Check for update" button.
You can check the list of components installed in Brave Browser by navigating to brave://components:
| Component | Supported By Brave | Component ID | What it does | Repo | Comments |
|---|---|---|---|---|---|
| Autofill States Data | No | eeigpngbgcognadeebkilcpcaedhellh | Contains a mapping of acronyms of state names in different countries to the full names. Helps ease autofilling of state data. | ||
| Brave Ad Block Updater | Yes | iodkpdagapdfkphljnddpjlldadblomo | Contains Brave's default adblock lists | https://github.com/brave/brave-core-crx-packager | Component ID "mined" to include the substring adblo
|
| Brave Ad Block List Catalog | Yes | gkboaolpopklhgplhaaiboijnklogmbc | Enumerates all Brave's supported regional list components | https://github.com/brave/adblock-resources/tree/master/filter_lists/list_catalog.json | |
| Brave Ad Block Resources Library | Yes | mfddibmblmbccpadfndgakiopmmhebop | Enumerates all Brave's default resource replacements and scriptlets for adblocking | https://github.com/brave/adblock-resources, https://github.com/brave/uBlock | |
Regional lists (e.g. Easylist-Cookie List - Filter Obtrusive Cookie Notices) |
Yes | various | Contains any regional lists enabled in brave://settings/shields/filters | https://github.com/brave/adblock-resources/tree/master/filter_lists/list_catalog.json | See list_text_component fields for relevant component IDs |
| Brave Local Data Updater | Yes | afalakplffnnnlkncjhbmahjfjhmlkal | Used to update Greaselion scripts, etc. | https://github.com/brave/brave-site-specific-scripts | |
| Brave Tor Client Updater | Yes | cldoidikboihgcjfkhdeidbpclkineef cpoalefficncklhjfpglfiplenlpccdb biahpgbdmdkfgndcmfiipgcebobojjkp |
Contains the Brave Tor client required to support Tor windows | https://github.com/brave/tor_build_scripts/ | |
| Brave User Model Installer | Yes | kkjipiepeooghlclkedllogndmohhnhi | Maintains data files to support Brave Ads | https://github.com/brave/brave-core-crx-packager/blob/master/scripts/packageClientModelParameterComponent.js | |
| Certificate Error Assistant | Yes | giekcmmlnklenlaomppkphknjmnnpneh | Helps fix errors in misconfigured SSL certificates | ||
| CRLSet | Yes | hfnkpimlhhgieaddgfemjhofmfblmnib | Maintains a list of websites with bad certificates so that users can be protected from harmful websites | ||
| Crowd Deny | Yes | ggkkehgbnfjpeggfpleeakpidbkibbmn | Revokes all permissions for sites in the list | ||
| Federated Learning of Cohorts | No | Floc | Has data to support FLOC | This feature has significant privacy risks and should not be enabled in Brave | |
| File Type Policies | Yes | FileTypePolicies khaoiebndkojlmppeemjhbpbandiljpe |
List of file extensions and how they are handled in download protection | This is used by Safe Browsing | |
| Hyphenation | Yes | jamhcnnkihinmdlkakkaopbjbbcngflc | Data that assists css-hyphens in chromium | ||
| Legacy TLS Deprecation Configuration | No | TLSDeprecationConfig | This component adds a whitelist of domains that can use deprecated TLS 1.0/1.1 components. | Not needed. We disable TLS 1.0/1.1 completely in Brave. | |
| MEI Preload | Yes | laoigpblnllgcgjnjnllmfolckpjlhki | Used to pre-seed the Media Engagement Index which determines whether auto-play is enabled on a site | https://www.chromium.org/audio-video/autoplay/autoplay-pre-seeding-in-chrome | |
| NTP Sponsored Images | Yes | gccbbckogglekeggclmmekihdgdpdgoe | Updates the NTP Sponsored image assets | https://github.com/brave/brave-core-crx-packager/tree/master/scripts/ntp-sponsored-images | |
| NTP Background Images | Yes | aoojcmojmmcbpfgoecoadbdpnagfchel | Updates the NTP background image assets | https://github.com/brave/brave-core-crx-packager/blob/master/scripts/packageNTPBackgroundImagesComponent.js | |
| Origin Trials | No | OriginTrials | Metadata for origin trials | ||
| Safety Tips | Yes | jflookgnkcckhobaglndicnbbgbonegd | Protobuf of domains for client side lookalike URL detection | ||
| Subresource Filter Rules | No | Subresource Filter | Contains rules to block websites which don’t follow the better Ads Standard. Its often used to block phishing domains | ||
| Widevine | Yes | oimompecagnajdejgnnjijobebaeigek | Widevine’s DRM solution provides the capability to license, securely distribute and protect playback of content on any consumer device | ||
| Zxcvbn Data Dictionaries | No | ojhpjlocmbogdgmfpkhlaaeamibhnphh | This contains the data like popular English words and names to higlight password strength. | The work to develop a custom password check is being tracked here: https://github.com/brave/brave-browser/issues/12001 |