* Update README.md
Added Thunderbird references to match all other installation methods.
Reordered sections to provide overall document consistency.
Reordered reference links and removed unneeded ones.
Renamed All Browsers section to All Programs to be more general and given the fact that Thunderbird is not a browser.
Rewrote "'Do NOT" paragraph under All Programs section to provide consciousness and a more clear general message.
Combined License & Privacy Links under About section.
Other miscellaneous fixes, removals, cleanups, etc.
* Update README.md
Adjusted download button order as per feedback.
Shortened Popup UI table header names.
Improved Popup UI table by combining descriptions and information into one sentence for each column.
Removed no longer needed reference links.
* Update README.md
Updated sentence in Firefox section to further address more feedback.
* Update README.md
Updated sentence in Firefox section to link to the corresponding Wiki article.
Added dedicated Translations section and removed old corresponding sentence.
Removed out of place sentence and corresponding links from reference links section and combined other sentence with first paragraph to reduce primary section for conciseness.
Removed excessive descriptions for items that are implied or should be common knowledge today.
Rewrote sentences as needed to provide more conciseness and reduce wordiness.
Fixed grammar issues.
Fixed consistency issues.
Merged the initial brief description paragraph with the general information section for conciseness and to reduce large amounts of redundancy.
Merged both "Do NOT" statements in the All Browsers section for conciseness and to reduce redundancy.
Rewrote and restructured the new primary section for conciseness and consistency and to eliminate redundancy as needed.
Removed obsolete sentence from the About section.
Other minor cleanups and fixes.
* Improve README.md
Removed Safari references. (It has been several years since any relevancy.)
Removed majority of Enterprise Deployment section. (Existing links are dead, or information provided is deprecated.)
Merged Microsoft Edge section into Chromium section for simplification. (Microsoft Edge has been Chromium-based for the last few years.)
Restructured and shortened sections, links, and explanations to make them more concise.
Rewrote sentences for better clarity and to reduce wordiness.
Fixed uBO naming conventions.
Fixed spelling and grammar issues.
Fixed coding and formatting issues.
Fixed consistency issues.
Updated names as needed.
Updated section header titles as needed.
Updated URLs.
Other minor fixes.
* Removed Pronunciation section as per feedback.
Removed Pronunciation section.
* Addressed feedback and fixed more consistency issues
Removed Firefox Legacy section.
Removed Debian section.
Removed applicable links.
Added links to remaining section headers without a prior link in the table of contents.
Updated links in the table of contents to match section header names.
Renamed Philosophy section to General Information section.
Removing this makes AMO redirect to either `/firefox` or `/android` depending on your user agent.
The `/android` version of the URL hides unsupported extensions from the front page.
Updated several links to include new URLs for web pages that have moved, that have altered their exact URL path, updated the publisher's name and URL of the Microsoft Edge version, updated remaining http URLs to reflect https, updated different versions of URLs to match for better consistency, etc...