Follow up to Bug 1455226. To fix a toolbox destroy issue in Bug 1455226, we stopped loading the memory panel initializer.js file via a script tag. Instead it is now loaded via memory/panel.js. (see Bug 1455226 for more details about why this is needed) This can potentially affect all panels, so we should apply a similar strategy everywhere. The goal of this bug is to prepare the work for this. Most likely: - come up with a consistent pattern we can use in all tools - submit it via a rfc - once we have consensus, transform this bug in a meta and log bugs for each tool Today most panels use a mix of code in {panel}.xhtml, a panel.js (loaded from definitions.js) and a initializer.js (loaded via a script tag in {panel}.xhtml) The pattern we come up with, should make this consistent, avoid relying on script tags, and hopefully reduce the dispersion of the init/destroy code of our panels.

Morphing this bug into a meta one to track progress of the conclusion made in the following RFC: https://github.com/devtools-html/rfcs/issues/48 Which we could summarize as: * rename index file to index.html (or xul/xhtml when relevant (bug 1470244) * merge panel.js and initializer.js to panel.js * Instanciate all BrowserLoader's from definitions.js * Optional: remove or standardize the panel ready and destroyed events (bug 1443182)