To use these add-ons, you'll need to download Firefox.

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Iceggiren i Multithreaded Download Manager

Multithreaded Download Manager sɣur jingyu9575

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Tiririt sɣur jingyu9575

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yeffeɣ-d deg 7 jierren lyn
I haven't see any problems in Firefox 61.0.2. Firefox 57+ extension shouldn't be able to interfere the browser's exiting. I'll try to look into it.