Suggest an alternative to

run-a-script

A minimalistic Firefox extension that allows you to inject a single JS script in every page you visit

Why do you think that https://github.com/sienori/Tab-Session-Manager is a good alternative to run-a-script

A URL to the alternative repo (e.g. GitHub, GitLab)

Here you can share your experience with the project you are suggesting or its comparison with run-a-script. Optional.

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