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Preview of LoadMagic.ai HAR Transaction Marker

LoadMagic.ai HAR Transaction Marker by David Campbell

Firefox sidebar utility for bracketing HAR recordings with start/end transaction markers and DCAI headers.

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Extension Metadata

Screenshots
Use 1. type transaction name, 2. hit return, 3. record user flow (HAR file via F12 dev mode), 4. hit end to mark end of transaction, 5. repeat as required, 6. save json file via "Download marker timeline" button
About this extension
Free addon to save transaction markers to JSON file which can later be used with a HAR file to set wrappers around desired transactions in a user flow.

Anyone who wants to capture timings as they perform actions in a browser could find this useful.

Usage:
1. type transaction name
2. hit return
3. record user flow (HAR file via F12 dev mode)
4. hit end to mark end of transaction
5. repeat as required
6. save json file via "Download marker timeline" button
Developer comments
This addon is particularly useful for the https://loadmagic.ai automated transformation from recorded user flows in the form of HAR files to mark transaction wrappers automatically when ingesting the HAR files.

However, this could be used by anyone who needs to mark timestamps while performing browser actions.
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Permissions and data

Required permissions:

  • Access browser tabs

Data collection:

  • The developer says this extension doesn't require data collection.
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More information
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Version
0.1.0
Size
437.21 KB
Last updated
14 days ago (Jan 15, 2026)
Related Categories
  • Web Development
License
MIT License
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