A download accelerator is one which helps in increasing the download speed by establishing various links to the same download server. So virtually it is like splitting the file to be downloaded into various parts and downloading each part separately at the same time to increase the speed and reduce the time of download of the file from the internet.
How to disable all the flash in SeaMonkey using AdBlock plus ( flashblock not working when JavaScript is disabled)
Flash block is a very good add-on for blocking flash in SeaMonkey, but when you disable JavaScript in the browser, the flashblock add-on does not work. So here is an alternative. In SeaMonkey after installing AdBlock plus, do the following to remove flash completely. Open AdBlock plus (Go to tools > AdBlock plus). Now click the filters menu and select ADD FILTERS. Now in the filter rule type *.swf and click the apply button. Here after you will not be able to view flash in your browser. Blocking flash helps save a lot of bandwidth. If you want to see flash in a particular page then you will have to disable AdBlock plus by going to AdBlock plus > options >and uncheck the Enable AdBlock plus menu.