FloatBrowser.app

Steps to follow

Open FloatBrowser
Download Standalone App Package
If it is a zip file, Double click to unzip
Drag it into the Application Folder
Important: Delete the old standalone app from the Application Folder first if you have it (If you are the first time to follow the instructions to setup the standalone app, just ignore this step)
Launch the app from your Applications folder to check the installation, you will see the standalone app icon in your laptop menu bar
If you don't see the standalone app icon in the menu bar, it might be hidden due to limited space. Try quitting some other menu bar apps to make room for it.
If you see a security warning when launching the app, please refer to this Fix security warning
Click here to Launch Standalone App
When you see a verification success window, it means the standalone app is working
Quit FloatBrowser
Use default shortcut "Command+Shift+O" (O is short for "Open") to launch the standalone app window
Enjoy it

If you don't see the standalone app icon in the menu bar, it might be hidden due to limited space. Try quitting some other menu bar apps to make room for it.
Make sure to check the Hotkey Panel in Standalone App Settings to set your preferred hotkey
Each activation lasts 24 hours
Check remaining time in the menu bar
Reactivate by the step 7 link, then you will get another 24 hours
App will close automatically when time expires

Each time you prepare your job, you need to do the following steps

Open FloatBrowser
Open this page
Click here to Launch Standalone App
When you see a verification success window, it means the standalone app is working
Quit FloatBrowser
Use default shortcut "Command+Shift+O" (O is short for "Open") to launch the standalone app window
Enjoy it

Instructions for 0.31 and 0.32