Going into Dolphin{anty} settings through the left menu you can see 2 settings items:
Disable IndexDB sync
Change in this setting may result in unexpected outcome, including LOSS OF YOUR DATA.
Enable Extension Filesystem sync
Enabling this setting may significantly slow down your browser profile synchronization
It's worth explaining a bit what they do 🤔 ⬇️
1) IndexDB - is a storage in the browser that allows you to store files and is similar to LocalStorage, but unlike it can store larger amounts of data. Some sites can use it to cache the data they need about page visits, content viewed, etc. But in the case of extensions - it is only used by extensions that work with files, for example - photo editors.
🔵 What does disabling IndexDB synchronization do:
If your browser profile is loaded with a lot of data and has a large size - it will take longer to open and close due to the archiving of the profile and its synchronization, and by disabling this synchronization - this process can speed up, but there may be data loss on sites that use IndexDB to store important data, each site works differently.
2) Extensions file system - this is the extensions data that they cache and save during their work. What kind of data - depends on the extension itself and its goals.
🔵 What the extension file system does by enabling synchronization:
Extensions data, their cache, saved content and settings will be fully synchronized to the cloud along with browser profiles. This will give a full saving of your data but at the same time may slow down opening and closing of profiles.
Now you know "what and why", but remember that such actions you do at your own risk 😉