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PhotoShow – Privacy Policy & Terms of Use

Last updated: Dec 2, 2025

Extension Permissions

PhotoShow operates entirely within your local browser environment. Any permissions requested are solely used to enable features such as image previews, downloads, etc. PhotoShow does not access or manipulate unrelated data.

Read and change all your data on all websites
This permission is necessary for PhotoShow to function across all websites. PhotoShow does not read or modify content unrelated to its core functionality.

Manage your downloads
Required for enabling image downloads through PhotoShow. PhotoShow does not read or retain your download history.

Modify data you copy and paste
This optional permission is used only for enabling features such as copying images or their URLs to the clipboard. PhotoShow does not access or read your existing clipboard content and has no permission to do so. Users are prompted before this permission is requested for the first time.

Usage Data Collection

Beginning with version 4.50.0 (released Nov 4, 2024), PhotoShow collects anonymous usage data to help improve features and usability. No personal or identifiable information is collected, and user privacy is a priority.

* As of version 4.67.0 (released May 25, 2025), usage data collection is temporarily disabled for Firefox users. This will remain inactive until a future update to the privacy policy.

The data collected is limited to:

1. Site Context

Page URL where PhotoShow is used
Frame indices containing relevant images
Page referrer and page title

2. Image Context

URLs of images viewed
DOM query selectors for thumbnails viewed via PhotoShow

3. PhotoShow Context

Settings-related actions within PhotoShow
PhotoShow features (e.g., viewing an image) and related parameters when they are being used
Number of images viewed or downloaded via PhotoShow

4. Errors & Exceptions

Error messages related to PhotoShow during usage

5. Device & Client Info

Session ID: A random, non-identifiable UUID scoped to the extension session
Client/User ID: Random UUIDs regenerated on reinstall; not tied to the user
Browser name, version, and language
Screen resolution
Platform type (e.g., Windows, macOS)
PhotoShow version and interface language
Approximate location: based on IP (region, city, country, continent)，the raw IP address is never collected

How Data Is Collected and Stored

All usage data is sent to Google Analytics using its Measurement Protocol API. PhotoShow's author and developers:

Do not own, store or directly access the data
Do not use tag-based approaches (e.g., gTag, GTM) for collecting usage data
Do not share or combine the data with any third parties

Google Analytics Advertising Consent Handling

PhotoShow explicitly denies consent for advertising-related data collection in all analytics payloads:

ad_user_data and ad_personalization parameters are always set to "denied"
No data is expected to be used for ad targeting or profiling

For technical documentation, see Google Analytics Consent Parameters.

How to Enable or Disable Usage Data Collection

You may opt out of anonymous usage analytics at any time:

Click the PhotoShow icon in your browser's extensions toolbar;
Open PhotoShow's Options page by clicking the “Settings ⚙️” button in the popup window header;
Scroll to the “Other Settings” section;
Check or uncheck: “Allow anonymous usage data to be collected to help improve PhotoShow”. If unchecked, no usage data will be collected.

Please note: reinstalling PhotoShow may reset this due to the lost of extension settings data when being uninstalled.

Risks Associated with Enabling “Mark Viewed Image Links” and “Mark Viewed Image Thumbnails”

As of version 4.74.0 (released Aug 27, 2025), PhotoShow provides two optional Assistance and Enhancements features: Mark viewed image links and Mark viewed image thumbnails.

When enabled (both features are disabled by default), these functions display a small visual indicator alongside image links or thumbnails that have been viewed with PhotoShow, helping users keep track of which items they have already opened.

These indicators are displayed only temporarily within the current page session and will disappear once the page reloads or the website updates its content. PhotoShow does not store, transmit, or maintain any viewing history for this feature.

Users should be aware that, although the likelihood is low, enabling these markings may theoretically expose browsing behavior to techniques sometimes categorised as “history sniffing”. Such techniques could be employed by visited websites, third-party scripts, or browser extensions to infer user activity.

Risks Associated with Enabling “Allow cross-site image loading”

As of version 4.83.0 (released Dec 2, 2025), PhotoShow provides an optional Assistance and Enhancements feature: Allow cross-site image loading (only available in Chrome, Edge, and other Chromium-based browsers).

When enabled (disabled by default), PhotoShow modifies certain response headers of image requests—such as Cross-Origin-Resource-Policy (CORP)—and may adjust additional security-related headers used in XHR or fetch requests. Relaxing these restrictions allows images to load even when the image’s hosting server prevents its content from being accessed by pages on a different origin.

This can improve the image viewing or downloading experience in scenarios where images are sourced from external domains, including various search results pages and sites that aggregate content from multiple origins.

Users should note that relaxing these browser-level protections introduces potential risks, such as:

Cross-origin data exposure:

Websites or scripts may gain access to image content, or infer information, that would otherwise be blocked by strict CORP or related policies.

Reduced effectiveness of browser built-in security mechanisms:

Protections related to isolation, controlled resource loading, and origin separation for images and certain requests may no longer function as intended.

Cross-site tracking or behavioral profiling:

Malicious websites or extensions might use the increased availability of cross-origin resources to analyse patterns in how the browser loads content, potentially inferring aspects of browsing behaviour.

Unexpected site behavior:

Some websites might rely on strict security headers for correct operation. Overriding these headers may cause layout issues, loading inconsistencies, or unexpected interactions.

This feature is strictly optional and should be enabled only by users who understand and accept the implications.

Disclaimer

PhotoShow’s author and developers are not responsible for:

Any loss, data leakage, disputes, or consequences arising from the illegal use, retrieval, or download of content (including images) from websites you visit
Any damages, claims, or liabilities resulting from misuse of the extension or from unintended behavior caused by website changes, browser limitations, or third-party code
Any privacy, security, or data-exposure risks associated with optional features that alter how websites behave or how browser-level protections operate, including but not limited to:
- Mark viewed image links
- Mark viewed image thumbnails
- Allow cross-site image loading
Any consequences arising from enabling features that may increase exposure to tracking, history-sniffing techniques, fingerprinting, or cross-origin resource access

PhotoShow is a utility tool. How you choose to use it remains solely your responsibility, and enabling optional enhancement features indicates your acceptance of all associated risks.

Changes to This Policy

We reserve the right to modify this Privacy Policy & Terms of Use at any time. Updates will be published on official channels (e.g., extension store listing, this site, etc.). Continued use of PhotoShow after such changes constitutes your acceptance of the updated terms.

User Consent

Installing or using PhotoShow is deemed as your acceptance of the terms outlined in this document.

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