Bug 1433078 - Update readme file; r=jdescottes

MozReview-Commit-ID: HA2Fe9TlgEo

--HG--
extra : rebase_source : 3b54a8e8d09a2553dfec6249da830ec88dad498c

devtools/client/netmonitor/README.md

@@ -9,7 +9,7 @@ If you want to build the Network Monitor inside of the DevTools toolbox (Firefox
 If you would like to run the Network Monitor in the browser tab (experimental), you need following packages:
 
 * [node](https://nodejs.org/) >= 6.9.x JavaScript runtime.
-* [yarn](https://yarnpkg.com/docs/install) >= 0.21.x the pacakage dependency management tool.
+* [yarn](https://yarnpkg.com/docs/install) >= 0.21.x the package dependency management tool.
 * [Firefox](https://www.mozilla.org/firefox/new/) any version or build from the source code.
 
 ## Quick Setup
@@ -65,7 +65,7 @@ Open `localhost:8000` in any browser to see the [launchpad](https://github.com/d
 
 ### Develop with related modules
 
-When working on make the Network Monitor running in the browser tab, you may need to work on external modules. Besides the third party modules, here are modules required for the Network Monitor and is hosted under `devtools-html` (modules shared accross Devtools):
+When working on make the Network Monitor running in the browser tab, you may need to work on external modules. Besides the third party modules, here are modules required for the Network Monitor and is hosted under `devtools-html` (modules shared across Devtools):
 
 * [devtools-config](https://github.com/devtools-html/devtools-core/blob/master/packages/devtools-config/#readme) config used in dev server
 * [devtools-launchpad](https://github.com/devtools-html/devtools-core/blob/master/packages/devtools-launchpad/#readme) provide the dev server, landing page and the bootstrap functions to run devtools in the browser tab.
@@ -109,7 +109,7 @@ The Network Monitor UI is built using [React](http://searchfox.org/mozilla-centr
 * Three major container components are
   - **Toolbar** Panel related functions.
   - **RequestList** Show each request information.
-  - **NetworkDetailsPanel** Show detailed infomation per request.
+  - **NetworkDetailsPanel** Show detailed information per request.
   - **StatusBar** Show statistics while loading.
 * `src/assets` Styles that affect the Network Monitor panel.
 
@@ -126,4 +126,4 @@ Besides the UI, the Network Monitor manages the app state via [Redux](http://sea
 * `src/reducers/` for all reducers that change the state.
 * `src/selectors/` functions that return a formatted version of parts of the app state.
 
-We use [immutable.js](http://facebook.github.io/immutable-js/) and [reselect](https://github.com/reactjs/reselect) libraries to return a new state object efficiently.
+We use [reselect](https://github.com/reactjs/reselect) library to perform state calculations efficiently.