Requirements and restrictions for Session Replay 2.0 β

Support for the outdated code snippet
By default, Yandex.Metrica uses a new code snippet for the tag. To use Webvisor 2.0, replace the old snippet with the new one on all of your site's pages. You can find it on the Settings page. If the site has the old snippet installed and you want to use Session Replay 1.0, select the Obsolete code snippet option.
Limit on period for storing recordings
Data is stored for 15 days, including the current day.
Limit on number of recordings per day
Session Replay records up to 150,000 sessions a day with a margin of error. The system provides a representative sample by recording a spread of sessions throughout the day.
Using Session Replay 2.0 if the site has multiple tags
In this case, enable Session Replay 2.0 on just one of the installed tags. If Session Replay 2.0 is enabled for all the tags, the data will be recorded by the tag that initializes first on the site.
Recommended site encoding
Session Replay records user actions correctly if UTF-8 encoding is used on the site.
Valid HTML layout on pages
If there are a large number of HTML markup errors (unclosed tags, incorrect nestings, etc.), this may lead to inaccuracies in session replays. Session Replay usually adapts to such errors, but having correct HTML structure on site pages is preferable.
Recording pages with flexible layout
Sessions on pages with flexible layouts will be replayed correctly, even if the resolution of the user’s screen is not the same as the replay screen. During playback, you might see small cursor jumps due to different relative positioning of elements on the recorded and replayed pages.
Canvas support
Session Replay doesn't record site content if it is displayed using the canvas element.
Recording video and audio content
Session Replay doesn't record the content of HTML audio and video elements or how the user interacts with them if the Audio and Video objects are modified inside these elements.
Recording Flash content
Session Replay records Flash content on the site, but it doesn't play back the user's interaction with this content.
Support for Shadow DOM

If Shadow DOM elements specified in the W3C standard are modified, Session Replay doesn't record their content. In addition, Session Replay does not record Shadow DOM for custom HTML elements.

Browser support

Session Replay records sessions in most modern desktop browsers: Yandex.Browser, Google Chrome, Firefox, Safari, Opera, and Internet Explorer. There is limited support for recording in beta versions and in certain mobile browsers. There is also limited playback of sessions in any version of Internet Explorer.

Different browsers may process the same page in different ways. This means that to accurately replay a session, you should use the same browser as it was originally recorded in.

Select a question to find a solution.

Do the following:

  • Clear the browser cache.
  • Disable all plugins and browser extensions.
  • Delete browser cookies.
  • Check the firewall settings. The firewall may be blocking the Yandex.Metrica tag script. The tag could also be blocked by the Adblock Plus extension.

If you have more questions about Session Replay, submit them in the form below. Provide an example of a session with incorrectly displayed data and specify the full version of your browser.