>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 STR_1: 1. Open url https://pbs.twimg.com/media/Cwqc7ApWgAEfFJt.jpg:large in a new selected tab 2. Drag and drop selected tab to the downloads toolbarbutton 3. Open downloads panel, click on the file saved in Step 2 AR: Step 2 - Firefox saved image with name "Cwqc7ApWgAEfFJt.jpg large.jpg%20large". Step 3 - Windows7 can't open the file with extension ".jpg%20large" ER: Step 2 - Firefox should save image with extension ".jpg"
User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0 I have tested this issue on Windows 10 x64 with the latest Firefox release (50.1.0) and the latest Nightly (53.0a1-20170104030214) and managed to reproduce it following the steps in STR_1.
Component: Untriaged → File Handling
Same cause as bug 1327844.
Status: NEW → RESOLVED
Last Resolved: a year ago
Resolution: --- → DUPLICATE
Duplicate of bug: 1327844
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