Added Firefox Addon Link to Easy to RSS (#99)

Author: Facni

README.md

@@ -1556,7 +1556,7 @@ Inspired by [Awesome lists](https://github.com/sindresorhus/awesome) and [@realS
 ### RSS Feed Finding/Detection
 
 - [RSSHub Radar](https://diygod.me/rsshub-radar/) <sup>[47](https://t.me/s/aboutrss/47), [116](https://t.me/s/aboutrss/116)</sup> [![][Chrome icon]](https://chrome.google.com/webstore/detail/kefjpfngnndepjbopdmoebkipbgkggaa)[![Firefox][Firefox icon]](https://addons.mozilla.org/zh-CN/firefox/addon/rsshub-radar/)[![Windows][Windows icon]](https://microsoftedge.microsoft.com/addons/detail/gangkeiaobmjcjokiofpkfpcobpbmnln)[![Open-Source Software][oss icon]](https://github.com/DIYgod/RSSHub-Radar)
-- [Easy to RSS](https://idealclover.top/projects.html) [![][Chrome icon]](https://chrome.google.com/webstore/detail/easy-to-rss/hbcmpkcpbnecinpngdnfbnknfkdpdfli)[![Open-Source Software][oss icon]](https://github.com/idealclover/easy-to-rss)
+- [Easy to RSS](https://idealclover.top/projects.html) [![][Chrome icon]](https://chrome.google.com/webstore/detail/easy-to-rss/hbcmpkcpbnecinpngdnfbnknfkdpdfli)[![Firefox][Firefox icon]](https://addons.mozilla.org/zh-CN/firefox/addon/easy-to-rss/)[![Open-Source Software][oss icon]](https://github.com/idealclover/easy-to-rss)
 - [RSS+](https://greasyfork.org/scripts/373252-rss-show-site-all-rss)
 - [Feedsearch](https://feedsearch.dev/) <sup>[310](https://t.me/s/aboutrss/310)</sup> [![Open-Source Software][oss icon]](https://github.com/DBeath/feedsearch-crawler)![Freeware][freeware icon]
 - [RSS Subscription Extension](https://chrome.google.com/webstore/detail/rss-subscription-extensio/nlbjncdgjeocebhnmkbbbdekmmmcbfjd) <sup>[321](https://t.me/s/aboutrss/321)</sup> ![Chrome][Chrome icon]