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Browser Extensions

In general, we recommend keeping your browser extensions to a minimum to decrease your attack surface. They have privileged access within your browser, require you to trust the developer, can make you stand out, and weaken site isolation.

However, some provide functionality which can outweigh these downsides in certain situations, particularly when it comes to content blocking.

Don't install extensions which you don't immediately have a need for, or ones that duplicate the functionality of your browser. For example, Brave users don't need to install uBlock Origin, because Brave Shields already provides the same functionality.

Content Blockers

uBlock Origin

uBlock Origin logo

uBlock Origin is a popular content blocker that could help you block ads, trackers, and fingerprinting scripts.

Repository

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We suggest following the developer's documentation and picking one of the "modes". Additional filter lists can impact performance and may increase attack surface.

These are some other filter lists that you may want to consider adding:

uBlock Origin Lite

uBlock Origin also has a "Lite" version of their extension, which offers a very limited feature-set compared to the original extension. However, it has a few distinct advantages over its full-fledged sibling, so you may want to consider it if...

  • ...you don't want to grant full "read/modify website data" permissions to any extensions (even a trusted one like uBlock Origin)
  • ...you want a more resource (memory/CPU) efficient content blocker1
  • ...your browser only supports Manifest V3 extensions

uBlock Origin Lite logo

uBlock Origin Lite is a Manifest V3 compatible content blocker. Compared to the original uBlock Origin, this extension does not require broad "read/modify data" permissions to function.

Repository

Downloads "下載"

We only recommend this version of uBlock Origin if you never want to make any changes to your filter lists, because it only supports a few pre-selected lists and offers no additional customization options, including the ability to select elements to block manually. These restrictions are due to limitations in Manifest V3's design.

This version offers three levels of blocking: "Basic" works without requiring any special privileges to view and modify site content, while the "Optimal" and "Complete" levels do require that broad permission, but offer a better filtering experience with additional cosmetic rules and scriptlet injections.

If you set the default filtering mode to "Optimal" or "Complete" the extension will request read/modify access to all websites you visit. However, you also have the option to change the setting to "Optimal" or "Complete" on a per-site basis by adjusting the slider in the extension's pop-up panel on any given site. When you do so, the extension will request read/modify access to that site only. Therefore, if you want to take advantage of uBlock Origin Lite's "permission-less" configuration, you should probably leave the default setting as "Basic" and only adjust it higher on sites where that level is not adequate.

uBlock Origin Lite only receives block list updates whenever the extension is updated from your browser's extension marketplace, as opposed to on demand. This means that you may miss out on new threats being blocked for weeks until a full extension release is published.

AdGuard

We recommend Safari for iOS users, which unfortunately is not supported by uBlock Origin. Luckily, Adguard provides an adequate alternative:

AdGuard logo

AdGuard for iOS is a free and open-source content-blocking extension for Safari that uses the native Content Blocker API.

Homepage

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額外的過濾器清單會減慢速度,並可能會增加您的攻擊面,因此只應用您需要的東西。 iOS 版 AdGuard 有一些高級功能;然而,標準Safari 內容封鎖是免費的。

標準

  • 不得複製內建瀏覽器或作業系統功能。
  • 必須直接影響用戶隱私,即不得簡單地提供資訊。

  1. uBlock Origin Lite itself will consume no resources, because it uses newer APIs which make the browser process the filter lists natively, instead of running JavaScript code within the extension to handle the filtering. However, this resource advantage is only theoretical, because it's possible that standard uBlock Origin's filtering code is more efficient than your browser's native filtering code. This has not yet been benchmarked. 

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