Side View
An experiment with opening mobile views of pages in the sidebar.
Install from addons.mozilla.org
Installing
Use npm install, then npm start.
Installing manually
Check out the repository. Go to about:debugging in Firefox, and select Load Temporary Add-on. Select a file in the addon/ directory.
Or: install web-ext (like npm i -g web-ext) and run web-ext run -s addon/ --browser-console -f nightly
Using
This adds a context menu item: Open in sidebar or Open link in sidebar. Select that, and the sidebar will be opened with a mobile view of the page.
Credits
Anthony_f's Sidebar for Google Search inspired this add-on's approach.