Some fields are absolutely required by a page to function correctly. However, these fields may also contain tracking elements. In such cases, we only have the choice between preventing tracking and a functioning service. Below we list all the fields not included in the official rules because they have caused problems in the past.
| Site / Service | Field | Description |
|---|---|---|
hl |
Required for the correct display of Google in different languages | |
gbv |
Required for Google, when visiting without JavaScript | |
client |
Required for asynchronous requests to the API (is filtered on Google Search) | |
stick |
Required for "People also search for" on Google search | |
zx |
Required for serveral Google services (Hangout, GMail Mailenvelope, etc.) | |
| Amazon | s |
Required for sort search results by "Featured", "Price: Low to High", "Price: High to Low", "Avg. Customer Review" and "Newest Arrivals" (is only not filtered on Amazons search page) |
| Amazon | psc |
Required to link to an article, which is available in different versions (e.g., color or size) |
| Amazon | SubscriptionId |
Required for subscriptions |
| Amazon Search | keywords |
Amazon search can loop without this field. See #55 |
| Cloudflare | __cf_chl_jschl_tk__ |
Require by Cloudflare to verify, that an user successfully passes a IUAM/JS Challenge or Captcha |
| Cloudflare | __cf_chl_captcha_tk__ |
Require by Cloudflare to verify, that an user successfully passes a IUAM/JS Challenge or Captcha |
| backcountry.com | skid |
Required to link to an article, which is available in different versions (e.g., color or size) |
| backcountry.com | fskid |
Required to link to an article, which is available in different versions (e.g., color or size) |
| Adobe | cid |
Used by Adobe for tracking, but also required by many websites for correct functioning. This rule has been temporarily removed until a whitelist feature is available |
| TikTok | language |
Is no tracking and is required for the website, e.g., the profile view |
comment_id |
Required for comments | |
fbid |
Required by many different functions. Used mainly as internal ID and not for external tracking | |
| aliexpress | pvid |
Required for filtering search results |
| taobao.com | user_number_id |
Required for store frontpage (unique ID for specified store) |
| Twitter redirects | t |
Is required for redirect URLs inside of Twitter mails (!21) |
Last update:
January 30, 2023