# Web extension : add logs
**URL:** https://discourse.mozilla.org/t/web-extension-add-logs/73423
**Category:** Development
**Created:** [January 7, 2021, 9:27pm UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423 "2021-01-07T21:27:07Z")
**Posts on this page:** 6
**Page:** 1
### Author:  [@usero16](https://discourse.mozilla.org/u/usero16)
#### Post date: [January 7, 2021, 9:27pm UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/1 "2021-01-07T21:27:07Z")
I created a web extension (Firefox). I want to add logs to a external file (example: console.txt) from the content scripts and the background script. For example : write “Begin web extension”.
How can i do that? Thank you in advance for your help
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### Author:  [@freaktechnik](https://discourse.mozilla.org/u/freaktechnik)
#### Post date: [January 8, 2021, 9:07am UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/2 "2021-01-08T09:07:05Z")
You can not write to an external file. Check out [https://extensionworkshop.com/documentation/develop/debugging/](https://extensionworkshop.com/documentation/develop/debugging/) for techniques of troubleshooting issues.
If you want to have a debug log for diagnostics, you would collect the logs in-memory and then offer a [“download”](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Working_with_files#download_files_using_the_downloads_api) to the user or a way to copy the log contents to the clipboard.
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### Author:  [@Marcus\_Stricker](https://discourse.mozilla.org/u/Marcus_Stricker)
#### Post date: [January 9, 2021, 5:14pm UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/4 "2021-01-09T17:14:33Z")
Hi freaktechnik,
can i write to a database ?
maybe via sql connection to a mssql database ?
thanks
br caddy
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### Author:  [@freaktechnik](https://discourse.mozilla.org/u/freaktechnik)
#### Post date: [January 9, 2021, 5:16pm UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/5 "2021-01-09T17:16:22Z")
There are multiple storage facilities available:
[https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/storage)
or the DOM `localStorage` or [`indexedDB`](https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API) APIs.
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### Author:  [@jscher2000](https://discourse.mozilla.org/u/jscher2000)
#### Post date: [January 10, 2021, 8:39pm UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/6 "2021-01-10T20:39:31Z")
> [@Marcus\_Stricker](#):
>
> can i write to a database ?
> maybe via sql connection to a mssql database ?
Extensions don’t have any SQL Server libraries, so they need an intermediary such as a web application or local native application to write to SQL Server. These are both inconvenient for users to set up, so using the built-in storage facilities would be more convenient if you intend that for deployment. Well, even just for yourself…
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### Author:  [@Marcus\_Stricker](https://discourse.mozilla.org/u/Marcus_Stricker)
#### Post date: [January 11, 2021, 8:03am UTC](https://discourse.mozilla.org/t/web-extension-add-logs/73423/7 "2021-01-11T08:03:07Z")
Thanks for the answers
br caddy