共有
クッキーはウェブサイトの機能性を高める上で重要な役割を果たしていますが、プライバシーに関する懸念も引き起こしています。 Cookieを有効にするとユーザー体験が向上しますが、サードパーティのCookieを無効にすることで、オンライン上のプライバシーを保護することができます。ブラウザの設定を通じてクッキーを管理することで、ユーザーは利便性とセキュリティのバランスをとることができます。
このガイドでは、必要なプライバシーを確保できるよう、お使いのブラウザでクッキーを無効にする方法をご説明します。
監視から身を守るためには、分散型VPNを使用して、すべてのデータを保護してください。
How to disable third-party cookies
Disabling third-party cookies can enhance privacy while still allowing essential cookies for website functionality. Here’s how to disable them on different browsers.
- Open Chrome
- Click the three vertical dots in the top-right corner
- Select Settings > Privacy and security > Cookies and other site data
- Choose Block third-party cookies or Block third-party cookies in Incognito
- Open Firefox
- Click the three horizontal lines in the top-right corner.
- Select Settings > Privacy & Security
- Under Enhanced Tracking Protection, choose Custom
- Check Cookies and select the preferred blocking option
- Open Edge
- Click the three dots in the top-right corner**
- Select Settings > Site permissions
- Choose Manage and delete cookies and site data
- Enable Block third-party cookies
- Open Safari
- Click Safari > Preferences
- Go to the Privacy tab.
- Choose Prevent cross-site tracking or Block all cookies
Risks of disabling cookies on your browsers
Website breakage or limited functionality
Some websites rely heavily on cookies for basic functionality (like logging in, shopping carts, saving preferences). Without cookies, you may not be able to:
- Stay logged in
- Save language or theme preferences
- Complete online purchases easily
Annoying repeated prompts
Since cookies save your consent or denial to things like cookie banners, you’ll see these popups constantly if cookies are disabled.
Reduced personalization
Recommendations, saved preferences, and tailored experiences disappear. Example: No “recently viewed items” on shopping sites.
Some services won’t work
Services like online banking, web apps, or platforms like Gmail, Slack, etc., might behave poorly or refuse access entirely.
More verification requests
Websites can’t remember your session, so you’ll get more CAPTCHAs or “Verify it’s you” screens.
Privacy benefits of disabling and deleting cookies
Less tracking by advertisers
Cookies (especially third-party cookies) are one of the main tools for cross-site tracking and targeted advertising. Disabling cookies breaks a lot of this tracking.
Learn more about who’s tracking you online, and why.
Better defense against fingerprinting augmentation
Cookies can enhance browser fingerprinting by linking identifiers. Disabling cookies removes this easy linkage.
ブラウザフィンガープリント およびクッキーとの関係について、詳しくはこちらをご覧ください。
Session security
Regularly deleting cookies helps prevent session hijacking. If your cookies get stolen, attackers can access your accounts.
Avoid price manipulation
Some e-commerce sites track your visits and may raise prices if they see you repeatedly looking at an item.
Cleaner browser hygiene
Reduces clutter and storage bloat from thousands of cookie files.
More control
By managing cookies manually, you can selectively allow them only for trusted sites.
Nym’s summary
クッキーはウェブサイトの機能性を高める上で重要な役割を果たしていますが、プライバシーに関する懸念も引き起こしています。 Cookieを有効にするとユーザー体験が向上しますが、サードパーティのCookieを無効にすることで、オンライン上のプライバシーを保護することができます。ブラウザの設定を通じてクッキーを管理することで、ユーザーは利便性とセキュリティのバランスをとることができます。
Frequently Asked Questions
Yes, but they may regenerate themselves. To remove them completely, clear cookies and browser data, disable Flash storage, and use privacy-focused browser extensions.
Yes, tracking cookies and third-party cookies are commonly used to monitor user behavior across multiple sites for advertising and data collection.
著者について
Benjamin Nemeroff
Casey Ford. PhD
Technical reviewer目次
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