# Source: https://docs.streamlit.io/knowledge-base/using-streamlit

# FAQ

Here are some frequently asked questions about using Streamlit. If you feel something important is missing that everyone needs to know, please [open an issue](https://github.com/streamlit/docs/issues) or [submit a pull request](https://github.com/streamlit/docs/pulls) and we'll be happy to review it!

- [Sanity checks](/knowledge-base/using-streamlit/sanity-checks)
- [How can I make Streamlit watch for changes in other modules I'm importing in my app?](/knowledge-base/using-streamlit/streamlit-watch-changes-other-modules-importing-app)
- [What browsers does Streamlit support?](/knowledge-base/using-streamlit/supported-browsers)
- [Where does st.file_uploader store uploaded files and when do they get deleted?](/knowledge-base/using-streamlit/where-file-uploader-store-when-deleted)
- [How do you retrieve the filename of a file uploaded with st.file_uploader?](/knowledge-base/using-streamlit/retrieve-filename-uploaded)
- [How to remove "· Streamlit" from the app title?](/knowledge-base/using-streamlit/remove-streamlit-app-title)
- [How to download a file in Streamlit?](/knowledge-base/using-streamlit/how-download-file-streamlit)
- [How to download a Pandas DataFrame as a CSV?](/knowledge-base/using-streamlit/how-download-pandas-dataframe-csv)
- [How can I make `st.pydeck_chart` use custom Mapbox styles?](/knowledge-base/using-streamlit/pydeck-chart-custom-mapbox-styles)
- [How to insert elements out of order?](/knowledge-base/using-streamlit/insert-elements-out-of-order)
- [How do I upgrade to the latest version of Streamlit?](/knowledge-base/using-streamlit/how-upgrade-latest-version-streamlit)
- [Widget updating for every second input when using session state](/knowledge-base/using-streamlit/widget-updating-session-state)
- [How do I create an anchor link?](/knowledge-base/using-streamlit/create-anchor-link)
- [How do I enable camera access?](/knowledge-base/using-streamlit/enable-camera)
- [Why does Streamlit restrict nested `st.columns`?](/knowledge-base/using-streamlit/why-streamlit-restrict-nested-columns)
- [What is serializable session state?](/knowledge-base/using-streamlit/serializable-session-state)