The Tool Desk
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Check the exact extension’s publisher, permissions, privacy policy, and data-sharing controls. Turn off optional collection if the blocker offers that setting; disable or remove any extension whose practices you cannot verify or accept. For AI chats and other sensitive pages, use a browser profile with only extensions you have checked.
A broad permission such as “read and change all your data on the websites you visit” describes what an extension may be able to access. It does not, by itself, prove that the extension records or uploads page content. Collection practices differ by product, browser, and feature.
Understand what an access warning does—and does not—mean
Ad blockers need to interact with pages to identify and hide ads. Depending on the permission and browser, that can give an extension technical access to page URLs and content visible on those pages. Adblock Plus explains: “This means Adblock Plus can see the URL of the pages you open.” Its help page also says it does not track browsing history or record form entries. Adblock Plus Help Center: About Adblock Plus Permissions.
Capability is not the same as collection or transmission. The Electronic Frontier Foundation (EFF) makes this distinction in its Privacy Badger guidance: a permission warning alone cannot tell you whether an extension secretly uploads browsing data. To judge a specific blocker, look at its current disclosures and settings, not just the warning—or a claim that a permission is harmless.
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#1 Best Overall
Magicmoon 2-Pack 24 Inch Computer Privacy Screen Filter for 16:9 Monitor
- Compatible Model(s): Magicmoon brand filter only for 24 inch -diagonally measured - widescreen monitor - aspect ratio 16:9 - filter size: width: 20 15/16", Height: 11 13/16" (531mm x 298mm)
- Superior Privacy: The computer privacy filter makes the screen appear dark when looking at it from an angle (the angle is about 30 to 60 degree), but bright when looking directly at it. To change the privacy level - simply adjust your monitor’s brightness accordingly
- Eye and Screen Protection: Privacy Filter does not only protect your private life but also protects your eyes by blocking 30% of blue light , blocking the harmful blue light between 380 to 495 nm, it filters out the blue light and relieves eye strain
- Perfect For Open Workspaces: Great for maintaining screen privacy in open work spaces
- Includes Two Options: Option 1 uses clear adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that easily stick to the display frame, allowing you to slide the privacy screen filter on and off as needed
What selected ad blockers disclose
The details below reflect statements made by each product or project, not an independent security audit. They may differ by browser, platform, version, and feature. Confirm that the listing and publisher match the extension installed in your browser.
| Blocker | What its disclosure says | Controls or qualifications |
|---|---|---|
| Adblock Plus | Its permissions help page says the extension can see opened page URLs and technically see page content. It says it does not track browsing history or record form entries. The broader privacy policy describes product-specific collection for operation and improvement. | Details can vary among the browser extension, mobile product, and optional features. Read the policy for the exact product: Adblock Plus Privacy Policy. |
| AdBlock | An optional anonymous filter-list usage setting can collect subscribed filter lists, which rules blocked or hid resources, visited-site domain names, browser language, and information about certain site tags. Its permissions page says it can technically see forms or tab activity, while stating that it does not collect or store that information. | The usage setting is documented as disabled by default. If enabled, turn it off using the steps below. AdBlock’s opt-in usage and data collection disclosure; About AdBlock permissions. |
| Ghostery | Its policy says the extension sends daily basic telemetry about general settings and browser, operating system, language, and country; extra telemetry is sent if the user opts in. It says tracker reports sent to WhoTracks.Me concern observed tracking behavior, not the observer. Its phishing and malware feature checks visited URLs using a partial checksum rather than sending a full URL. Its Chrome disclosure describes aggregate, non-identifiable tracker-behavior signals and website-content handling limited to technical tracker metadata. | These are Ghostery’s own disclosures; check the policy and browser-specific disclosure for the version you use: Ghostery Privacy Policy and Chrome Web Store Limited Use Disclosure. |
| uBlock Origin | The project policy says, “uBO does not collect any data of any kind.” It says the extension has no home server or analytics/telemetry hooks and connects remotely to update filter lists and related assets. | The policy is displayed as last edited May 1, 2023. This statement concerns uBlock Origin, not similarly named products. uBlock Origin project privacy policy. |
| Privacy Badger | EFF says Privacy Badger does not share browsing data unless the user chooses to share it, for example by filing a broken-site report. It receives periodic learning updates and sends Global Privacy Control (GPC) and Do Not Track (DNT) signals; its primary function is blocking third-party tracking. | For details and current disclosures, see EFF’s Privacy Badger page. |
Turn off optional data collection in AdBlock
AdBlock’s documented opt-out path is:
- Click the AdBlock icon in the browser toolbar.
- Open the gear or settings control.
- Go to the General tab.
- Clear “Allow AdBlock to collect anonymous filter list usage and data.”
AdBlock says this optional setting is disabled by default. Its label or location may change, so check the setting in your installed version. Other blockers may use different controls or have no equivalent opt-out. AdBlock Help Center.
Rank #2
![[2 Pack] 24 Inch Computer Privacy Screen Filter for 16:9 Widescreen Monitor](https://m.media-amazon.com/images/I/41SBKw3J4ML._SL160_.jpg)
[2 Pack] 24 Inch Computer Privacy Screen Filter for 16:9 Widescreen Monitor
- 【24 PRIVACY FILTER DIMENSIONS】 Width: 20 15/16" (20.9 inches/532 mm), Height: 11 13/16" (11.8 inches/299 mm) - 16:9 Aspect Ratio. Mamol computer privacy filters are designed to be perfectly compatible with HP, Samsung, Dell, Lenovo, Acer, Asus, LG, ViewSonic and other brands of monitors. Please check the width and height dimensions of your computer screen before ordering. If you have any questions about the dimensions, please contact us.
- 【ENHANCED PRIVACY PROTECTION】Mamol 24 inch computer privacy filter keeps your electronic information confidential, making it excellent for use in high traffic areas. the computer privacy screen 24 inch is designed with advanced microlouver technology to block visibility at around 30 degrees and black out screens completely near 60 degrees.
- 【EYES PROTECTION】 This blackout privacy screen greatly reduces eye strain and minimizes potential hazards to vision. It filters 99.9% of UV rays and suppresses 98% of blue light. As a reversible 24-inch privacy screen filter: The glossy side of the protector provides extra clarity and greater privacy, and the matte side minimizes glare and distracting reflections. Satisfy your different daily uses as needed.
- 【BETTER HD CLARTIY】Mamol 24 inch computer privacy screen Shield adds an extra layer of AR Ultra HD light transmission compared to others. It maintains the high definition of the screen without sacrificing too much screen brightness. It won't reduce the brightness and cause eye fatigue because of the privacy screen installed on the screen.
- 【ANTI SCRATCH & WASHABLE 】Our privacy anti-glare Monitor film has a surface enhancement layer to protect the privacy filter from scratches and fingerprints. It is washable and reusable. Even after prolonged use, you will get a brand new privacy screen for your desktop computer monitor after cleaning. Very Durable!
Audit an extension before deciding whether to keep it
- Identify the installed extension. Open your browser’s extensions or add-ons manager and note the exact name and publisher. Make sure the installed listing corresponds to the publisher’s official product; similar names can refer to different software.
- Review the permissions in context. Note whether the extension can access all sites, then ask whether that capability fits its ad-blocking function. Do not treat access alone as proof of upload.
- Check the current policy and settings. Look for terms such as “telemetry,” “analytics,” “usage data,” “browsing history,” “page content,” “URLs,” “reports,” “opt-in,” and “retention.” Review any diagnostic, anonymous-use, or product-improvement switches.
- Disable optional sharing or remove the extension. Turn off controls you do not want. If the policy or available controls do not meet your needs, disable or uninstall the extension, then confirm it is gone from the extensions list.
- Recheck after updates. Extension behavior, browser APIs, settings, and privacy policies can change. Revisit the installed version’s disclosures instead of relying on an old comparison.
Protect sensitive AI conversations with a separate profile
Create a dedicated browser profile for AI services and other sensitive sites, and install only extensions you have checked. This reduces the number of extensions with page access. It does not guarantee privacy from the AI provider, browser vendor, operating system, or network, and it does not establish what any one extension does with data it can access.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to compare blockers fairly
Do not rank products based only on “open source,” “anonymous,” or the breadth of a permission warning. Compare the exact extension and platform on the points that determine what happens to data:
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Rank #3
SightPro 24 Inch 16:9 Computer Privacy Screen Filter for Monitor - Privacy Shield and Anti-Glare Protector
- 【Privacy Filter Dimensions】- Width: 20 15/16" (532 mm), Height: 11 13/16" (299 mm), Diagonal: 24" (609.6 mm) - SightPro Blackout Privacy Screen Filter is engineered to be compatible with HP, Dell, Samsung, Lenovo, LG, Acer, ASUS, ViewSonic, and other monitor brands. Please verify your computer screen's width and height measurements before ordering. It's not recommended to make your selection based solely on your computer screen's diagonal size.
- 【Two Attachment Options】- Installs in minutes. Option 1 uses clear adhesive strips that securely attach to any computer screen. Option 2 (for computer screens with a raised bezel only) uses slide mount tabs that easily stick to the display frame, allowing you to slide the privacy screen filter on and off as needed.
- 【Superior Privacy and Anti Glare】- Our advanced multi-layered film filter blacks out your computer screen when viewing from the side, while maintaining a crystal clear screen straight-on. It also protects your eyes from harmful glare, UV, and blue light. [Note: It does not block visibility directly behind you, regardless of the distance.]
- 【Perfect for Travel and Open Workspaces】- Our computer screen privacy filter is the ideal solution for healthcare providers, mobile workers, commuters, students, and business travelers. Now you can stay compliant and safeguard sensitive corporate information while working in airplanes, subways, airports and public areas.
- 【Package Contents】- Each package includes one privacy screen shield filter, two sets of clear adhesive strips, two sets of slide mount tabs, and a microfiber cleaning cloth. Buy with confidence – located in the US, Sight Pro specializes in providing best-in-class privacy solutions to individuals, small businesses, corporations, government, and educational institutions. Our privacy screens are Section 889 and TAA compliant.
- Whether page or URL access is technically needed for the advertised blocking function.
- What data the current disclosure says are collected or transmitted.
- Whether telemetry is on by default, opt-in, or adjustable.
- Whether remote checks or filter-list updates send URL-derived information.
- Whether data can be linked to a person or device, and how long they are retained.
- Whether the exact browser and version provide a usable opt-out.
Official product policies describe vendors’ stated practices; they are not proof of behavior from an independent audit. The available disclosures do not establish a prevalence rate for ad blockers collecting AI chat text, so a percentage or universal claim would be unsupported.
Quick Recap
Bestseller No. 3
Best Value
Peslv 2-Pack 24 Inch 16:9 Computer Monitor Privacy Screen, WxH:532 * 299mm
- 【PRIVACY FILTER DIMENSIONS】- Width: 20 15/16" (532 mm), Height: 11 13/16" (299 mm), Diagonal: 24" (609.6 mm) - Peslv Dark 24 inch Privacy Screen Filter is engineered to be compatible with 24in Dell, HP, Samsung, Lenovo, LG, Acer, ASUS, Toshiba, ViewSonic, Aoc, Sceptre, PHILIPS, ViewSonic and other brands monitors with 16:9 aspect ratio. Please verify your computer screen's width and height measurements before ordering. It is not recommended to select a size based solely on the diagonal.
- 【HIGH-CLASS PRIVACY ABLE】Peslv collected suggestions from more than 2000 computer users and performed 22188 anti-peep angle corrections on the micro-blind optical technology to ensure that any line of sight beyond +-30° facing the screen will be shielded. With a Peslv computer privacy screen 24 inch, Protect the privacy of your computer monitor screen and no longer leak any confidential data.
- 【2 MOUNTING OPTIONS FOR EASY INSTALLATION】The Peslv 24 inch privacy screen for monitor supply 2 installation options, Various installation options, are Compatible with both 24" computer monitors with raised bezels and full-screen 24" computer monitors without raised bezels, and convenient installation allows you to complete the installation in 9 seconds. NOTE: Monitors without raised bezels are only available with mounting option 2.
- 【EXCLUSIVE DOUBLE-SIDED TECHNOLOGY】24-inch monitor privacy filter has a double-sided surface technology developed by Peslv. Matte or Glossy. With the matte surface facing outward, you can experience the advanced AG anti-glare technology from Germany while maintaining a 30-degree privacy angle, softening the strong light outdoors, and making the screen content clearly visible. With the glossy side facing outward, you can get a super anti-peeping effect with a privacy angle of 26 degrees.
- 【PROTECT SCREEN ALSO EYES】Filtering optical materials imported from Japan can reduce 92% of blue light and 98% of UV light, and filter all harmful light emitted from the screen to protect your eyes. The high-transparent and reinforced built-in protective layer not only presents high-definition picture quality but also protects your screen from scratches. Hurry up and place an order, own a privacy screen for a computer monitor 24 inch, and protect your monitor screen and your eyes.
Rank #4
![[2-Pack] 24 Inch Privacy Screen for Computer Monitor Hanging Removable 16:9](https://m.media-amazon.com/images/I/41myUlG2izL._SL160_.jpg)
[2-Pack] 24 Inch Privacy Screen for Computer Monitor Hanging Removable 16:9
- 【Privacy Screen Dimensions】 Width: 21 9/16"(547 mm), Height:12 5/8"(320 mm), Diagonal=24 13/16"(630mm) - 16:9 aspect ratio. Zspeed computer privacy for computer monitor are designed to be perfectly compatible with Dell, HP, Samsung, Lenovo, LG, Acer, ASUS, Toshiba, ViewSonic, Aoc, Sceptre, PHILIPS, ViewSonic and other brands of monitors. ✔ Fits Most 24" Widescreen Monitors Designed for broader screen coverage. Please measure the visible width and height of your monitor before ordering, as monitor dimensions may vary by brand and bezel design
- 【Designed for Wider Compatibility】Unlike adhesive privacy filters that require an exact edge-to-edge fit, our hanging privacy screen is designed slightly wider to fit a broader range of 24-inch widescreen monitors across different brands. Not All 24" Monitors Have the Same Dimensions. For best results, please measure your monitor’s visible screen area before ordering
- 【Hanging Removable Easy to Install and Reusable】: The Hanging design monitor privacy screen installs in just seconds. Easily install remove, the screen without leaving any residue or damaging your monitor. It is washable and reusable. Even after prolonged use, you will get a brand new privacy screen protector for your desktop computer monitor after cleaning
- 【Clear View from the Front, Privacy from the Side】: Our 24 inch privacy screen for monitor utilizes advanced micro-louver technology to restrict The viewing angle is limited to ±30°. Anyone viewing from the side sees only a darkened screen, effectively preventing visual peeping. It is ideal for offices, healthcare environments, banks, and other workplaces where protecting sensitive information and maintaining reliable screen coverage is essential
- 【Eyes Protection】: This computer privacy screen engineered to block up to 96% of harmful blue light and 99% of ultraviolet radiation, reducing eye strain, fatigue, and headaches from long work sessions. Ideal for students，Office staff and healthcare workers who spend hours in front of their screens. Our computer screen privacy shield supports your long term vision health
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
