Download Management

this is a instead of browser's downloads management.

it make you easily to get downloads information,include file's name,process,speed,size and so on.

UPDATE:
The migration from manifest V2 to manifest V3 has brought the following changes due to the limitations of V3;
1. Hide the function of automatically changing the color of plug-in icon in browser under non MacOS.
2. Under MacOS, the function of automatically changing the browser plug-in icon is changed to execute when the browser focus changes, so as to reduce the times of opening the window
3. The icon is drawn in real time by OffscreenCanvas instead of the original PNG image file, so the icon in the browser will flash in some cases
4. When the audio is downloaded and played, a small window will appear in the non MacOS, which will be closed automatically after the audio is played (MacOS does not appear)

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2022.05.26 bug fix