### Make smooth-scroll smoother (#536)

Make smooth-scroll more smoother. To enable smooth-scroll, type `set smoothscroll` or add `smoothscroll: true` into your settings.

### Space key map (#537)

Allow to enable keymap <kbd>Space</kbd> key:

```json
"keymaps": {
"<Space>": { "type": "follow.start", "newTab": false },
"<C-Space>": { "type": "follow.start", "newTab": true, "background": false }
}
```

### Scroll console (#538)

Limits number of shown item on console completion. The hidden items

### Update README.md (#543 by @ryanstreur)
### Correct spelling of WebExtensions (#535 by @sleepypikachu)
### Update documents (#552 by @TeepaBlue)

### Use browser.runtime.onInstalled event (#539)
### Refactor background (#544)

see also: https://github.com/ueokande/vim-vixen/releases

### Add close tabs to the right command
Close tabs to the right by `Shift+D`. For current users, add the following keymaps into your configuration.

```
`"D": { "type": "tabs.close.right" },`
```

### Open homepage
Add key bindings to open homepage by `gh` and `gH`. `gh` opens homepage in current page, and `gH` opens homepage as new tabs.
For current users, add the following keymaps into your configuration.

```
"gh": { "type": "page.home" },
"gH": { "type": "page.home", "newTab": true },
```


For more details, see also release note:
https://github.com/ueokande/vim-vixen/releases/tag/0.20

This version contains small updates
- Fix issue with Tree Style Tab
- Cancel by Ctrl+[
- Hide console by Esc
- Search across tabs

urgent release to fix a bug

Small improvements and updates. Detailed release notes are available on GitHub Releases

Settings form: New setting interface is supported. You can configure settings by form easily in add-on preferences.

- Improve on some sites.
- Improve <kbd>[</kbd><kbd>[</kbd>/<kbd>]</kbd><kbd>]</kbd> command.

Detailed release notes are available on GitHub Releases

To enable new added operation, please add it with key-maps into your settings.

Find mode:
An operation "find.start" provides a find mode.
Operations "find.next" and "find.prev" find next and previous keyword.
"find.start" is mapped to /, and "find.next" and "find.prev" are mapped to nN by default, respectively.


Duplicate tabs:
An operation "tabs.duplicate" duplicates a current tab.
This feature is mapped to zd by default.

Pin/unpin tabs:
An operation "tabs.pin.toggle" toggles pinned/unpinned state for a tab.
This feature is mapped to zp by default.

Select first and last tab:
Operations "tabs.first" and "tabs.last" allow you to select first and last tab, respectively.
They are mapped to g0 and g$ by default.

Support modifier keys:
Support additional modifiers for key-bindings such as Alt, Meta, and Shift keys.
This changes also fix an issue on default shortcuts of Firefox on Mac OS.

Enable plugin on about:blank:
The plugin is enabled on about:blank page.

Following area tag links: Following mode (by f/F keys) support to open <area> tags.

And some other bug fix.
See release note for the details

Temporary disabling the plugin:
addon.toggle.enabled operation to disable the plugin temporary. That is bound to Shift+Esc in the default. For current users, please add following key binding into JSON in your settings manually:"<S-Esc>": { "type": "addon.toggle.enabled" }.

Blacklist support:
The new setting "blacklist" is supported. You can now specify URLs to disable plugin by patterns. For instance, when you describe "*.slack.com", the plugin are disabled on any Slack rooms. In addition, you can specify path patterns by concatenating a path or pattern, such as "foo.example.com/mail/*". Disabled plugin can be made re-enabled by Shift<+Esc (in default).

Improve for certain pages such as Gmail and Slack. Also fix behavior on console focus

## Improvement
- Support following links in `<iframe>` and `<frame>` tags.

## Bug
- Fix typing issue in text box on Slack and Twitter.
- Fix empty suggestion