[Jiaz]

@drag0night: maybe we talk about different things?!
Of course you can know size of downloads when you actual *download* them and then decide to forward/stop/download them... But MyJDownloader extension doesn't intercept downloads in browser, it simply collects Text/URLs and forwards them to JDownloader. At that stage there is no information as such as it is a download, is it a html file..what size does it have.

Also IDM Extension or browser also has to trigger/start the download in order to know the size.

Maybe you use it different than intended? You should not start/generate downloads in browser! Just copy the links and let JDownloader handle the rest. You can setup filter/rules there, eg filter anything smaller than x mb