1. Open a webpage with downloadable links (http://arxiv.org/abs/1207.5216 for example). 2. Select file to download (pdf for example: http://arxiv.org/pdf/1207.5216v2). 3. See the dialog: `External application is needed to handle` with two buttons: `launch` and `cancel`. 4. Only launch is available to start download. Select it. 5. Second dialog asks to open with `/usr/bin/xpdf (default)` or `Save`. 6. Don't press `Save` immediately. See in a terminal random name of file, sometimes with a part of contents: {{{ ls -la /tmp $ file /tmp/oeXvw4D+.pdf.part /tmp/oeXvw4D+.pdf.part: PDF document, version 1.5 }}} Tbb ignored `tor-browser_en-US/tmp` and use system /tmp 7. After pressing `Save` file removed from /tmp. This behaviour potentially affects users local anonimity with unencrypted and non-attached to memory system /tmp dirs; and affects users with portable TorBrowser versions. Partially downloaded files will saved in /tmp in the cases of TBB crushes or not completely erased. Will be preferably to isolate TorBrowser activity in user local catalogs only. **Trac**: **Username**: unknown