Answers.Body: <p>Because 5.0 does not include breaking changes, it is considered equally compatible with 4.7 extensions. There is always minor risk of breakage when upgrading software, but 4.7 to 5.0 is <a href="https://civicrm.org/blog/dev-team/v50-the-littlest-biggest-increment" rel="noreferrer">not considered a major upgrade</a>.</p>
  
  <p>From <a href="https://lab.civicrm.org/dev/release/issues/1#note_2843" rel="noreferrer">https://lab.civicrm.org/dev/release/issues/1#note_2843</a></p>
  
  <blockquote>
    <ul>
    <li>In the 4.x series,  tags mean the same as today. (Exact-match to version. An extension declaring 4.6 is not displayed for
    download on 4.7.)</li>
    <li>In the 5.x series,  tags imply forward compatibility. (An extension declaring 5.2 is displayed on 5.2, 5.3, etc. But
    not on 5.0.)</li>
    <li>To bridge them, 4.7 is forward compatible with 5.0. (An extension declaring 4.7 is displayed on 4.7, 5.0, 5.1, etc.)</li>
    <li>As today, a consumer sees the newest extensions that are compatible with their version.</li>
    </ul>
  </blockquote>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-18T17:46:13.763Z
Answers.LastActivityDate: 2018-06-18T17:46:13.763Z
Answers.UserDisplayName: Coleman
Answers.Body: <p>It is difficult to answer your question without detailed knowledge of your system and the extensions that you have installed.</p>
  
  <p>The best way to find out if there are any issues is to take a copy of your site and upgrade this in a test environment. I would recommend that you do this in any case before applying any updates to your system.  </p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2018-06-18T16:53:48.643Z
Answers.LastActivityDate: 2018-06-18T16:53:48.643Z
Answers.UserDisplayName: William Mortada
Body: <p>Most of my extensions are marked as compatible with 4.7 but do not explicitly say they will work with 5.0, 5.1, etc. Can I safely upgrade CiviCRM and continue to use the extensions?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-18T16:49:32.597Z
Comments.Text: Welcome to StackExchange! You are more likely to get a helpful reply if you could provide some more detail in your question.
Comments.UserDisplayName: William Mortada
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-18T17:24:39.913Z
Comments.Text: Without any specific extensions listed in your question, hard to say exactly, but I'd say that MOST extensions will work fine in 5.1 if they were stated to work in 4.7. The version number has changed but there were not many big, extension breaking changes.
Comments.UserDisplayName: jackrabbithanna
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2018-06-20T13:07:16.490Z
Comments.Text: I can confirm for example that https://civicrm.org/extensions/cdn-tax-receipts works even though it only says 4.7. I have it running on a 5.2.1 site.
Comments.UserDisplayName: Demerit
Tags: <extension><upgrade>
Title: Are extensions that work with CiviCRM 4.7 also compatible with 5.x?
ThreadText: # Are extensions that work with CiviCRM 4.7 also compatible with 5.x?
  
  (Asked by: username_0 on 2018-06-18)
  
  Most of my extensions are marked as compatible with 4.7 but do not explicitly say they will work with 5.0, 5.1, etc. Can I safely upgrade CiviCRM and continue to use the extensions?
  
  **Tags:** extension, upgrade
  
  > **Comments:**
  > **username_1**: Welcome to StackExchange! You are more likely to get a helpful reply if you could provide some more detail in your question.  
  > **username_2**: Without any specific extensions listed in your question, hard to say exactly, but I'd say that MOST extensions will work fine in 5.1 if they were stated to work in 4.7. The version number has changed but there were not many big, extension breaking changes.  
  > **username_3**: I can confirm for example that https://civicrm.org/extensions/cdn-tax-receipts works even though it only says 4.7. I have it running on a 5.2.1 site.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_4 on 2018-06-18. Score: 5
  
  Because 5.0 does not include breaking changes, it is considered equally compatible with 4.7 extensions. There is always minor risk of breakage when upgrading software, but 4.7 to 5.0 is [not considered a major upgrade](https://civicrm.org/blog/dev-team/v50-the-littlest-biggest-increment).
  
  From <https://lab.civicrm.org/dev/release/issues/1#note_2843>
  
  > * In the 4.x series, tags mean the same as today. (Exact-match to version. An extension declaring 4.6 is not displayed for
  >   download on 4.7.)
  > * In the 5.x series, tags imply forward compatibility. (An extension declaring 5.2 is displayed on 5.2, 5.3, etc. But
  >   not on 5.0.)
  > * To bridge them, 4.7 is forward compatible with 5.0. (An extension declaring 4.7 is displayed on 4.7, 5.0, 5.1, etc.)
  > * As today, a consumer sees the newest extensions that are compatible with their version.
  
  
  ---
  
  ### Answer by username_1 on 2018-06-18. Score: 2
  
  It is difficult to answer your question without detailed knowledge of your system and the extensions that you have installed.
  
  The best way to find out if there are any issues is to take a copy of your site and upgrade this in a test environment. I would recommend that you do this in any case before applying any updates to your system.
  
  
  ---
  
  