Tiddlyclip consists of 2 parts the browser addon and the tiddlywiki plugin
Click this link to start installing browser addon. https://github.com/buggyj/tiddlyclip/releases/download/0.1.10/tiddlyclip-0.1.10.xpi
Install the addon by downloading (click this link to download https://github.com/buggyj/tiddlyclip/releases/download/0.1.10/tiddlyclip-0.1.10.xpi) and unzipping (e.g. in a directory called tiddlyclip). Then in chrome navigate to chrome://extensions/ and click 'load unpacked extension' and go the tiddlyclip/extension/ directory to select the extension (it's the directory containing the 'manifest.json' file).
Note that chome will ask you to disable the 'developer mode' extensions each time you start the browser (but not with linux), as the extension was not loaded from the Chrome Web Store.
It is also necessary to install the tiddlywiki plugin: it can be located from the plugins repository (click the link in the readme):